“Procrastination”的意思、由来-开放百科全书

From a cultural perspective, students from both Western and non-Western cultures are found to exhibit academic procrastination, but for different reasons. Students from Western cultures tend to procrastinate in order to avoid doing worse than they have done before or from failing to learn as much as they should have, whereas students from non-Western cultures tend to procrastinate in order to avoid looking incompetent, or to avoid demonstrating a lack of ability in front of their peers.^[5] It is also important to consider how different cultural perspectives of time management can impact procrastination. For example, in cultures that have a multi-active view of time, people tend to place a higher value on making sure a job is done accurately before finishing. In cultures with a linear view of time, people tend to designate a certain amount of time on a task and stop once the allotted time has expired.^[6]

Various types of procrastination (such as academic/non academic or behavioural/ indecisive) have their own underlying causes and effects. The most prominent explanation in present literature draws upon "Intemporal discounting, task averseness and certain personality traits such as indecisiveness and distractibility" as the common causes of procrastination.

A study of behavioral patterns of pigeons through delayed reward suggests that procrastination is not unique to humans, but can also be observed in some other animals.^[7] There are experiments finding clear evidence for "procrastination" among pigeons, which show that pigeons tend to choose a complex but delayed task rather than an easy but hurry-up one.^[8]

Etymology

Latin: procrastinare, pro-, 'forward', with -crastinus, 'till next day' from "cras", 'tomorrow'

Prevalence

In a study of academic procrastination from the University of Vermont, published in 1984, 46% of the subjects reported that they "always" or "nearly always" procrastinate writing papers, while approximately 30% reported procrastinating studying for exams and reading weekly assignments (by 28% and 30% respectively). Nearly a quarter of the subjects reported that procrastination was a problem for them regarding the same tasks. However, as many as 65% indicated that they would like to reduce their procrastination when writing papers, and approximately 62% indicated the same for studying for exams and 55% for reading weekly assignments.^[9]

A 1992 study showed that "52% of surveyed students indicated having a moderate to high need for help concerning procrastination."^[10] It is estimated that 80–95% of college students engage in procrastination, and approximately 75% consider themselves procrastinators.

In a study performed on university students, procrastination was shown to be greater on tasks that were perceived as unpleasant or as impositions than on tasks for which the student believed they lacked the required skills for accomplishing the task.^[11]

Behavioral criteria of academic procrastination

Gregory Schraw, Theresa Wadkins, and Lori Olafson in 2007 proposed three criteria for a behavior to be classified as academic procrastination: it must be counterproductive, needless, and delaying.^[12] Steel reviewed all previous attempts to define procrastination, and concluded in a 2007 study that procrastination is "to voluntarily delay an intended course of action despite expecting to be worse off for the delay."^[13] Sabini & Silver argued that postponement and irrationality are the two key features of procrastination. Delaying a task is not deemed as procrastination, they argue, if there are rational reasons behind the delay.

An approach that integrates several core theories of motivation as well as meta-analytic research on procrastination is the temporal motivation theory. It summarizes key predictors of procrastination (expectancy, value, and impulsiveness) into a mathematical equation.^[13]

Psychological perspective

The pleasure principle may be responsible for procrastination; one may prefer to avoid negative emotions by delaying stressful tasks. As the deadline for their target of procrastination grows closer, they are more stressed and may, thus, decide to procrastinate more to avoid this stress.^[14] Some psychologists cite such behavior as a mechanism for coping with the anxiety associated with starting or completing any task or decision.^[15]

Piers Steel indicated in 2010 that anxiety is just as likely to induce people to start working early as late, and that the focus of studies on procrastination should be impulsiveness. That is, anxiety will cause people to delay only if they are impulsive.^[16]

Coping responses

Negative coping responses of procrastination tend to be avoidant or emotional rather than task-oriented or focused on problem-solving. Emotional and avoidant coping is employed to reduce stress (and cognitive dissonance) associated with delaying intended and important personal goals. This option provides immediate pleasure and is consequently very attractive to impulsive procrastinators, at the point of discovery of the achievable goals at hand.^[17]^[18] There are several emotion-oriented strategies, similar to Freudian defense mechanisms, coping styles and self-handicapping.

Coping responses of procrastinators include the following.{{citation needed|date=August 2013}}

Task- or problem-solving measures are taxing from a procrastinator's outlook. If such measures are pursued, it is less likely the procrastinator would remain a procrastinator. However, pursuing such measures requires actively changing one's behavior or situation to prevent and minimize the re-occurrence of procrastination.

In 2006, it was suggested that neuroticism has no direct links to procrastination and that any relationship is fully mediated by conscientiousness.^[19]

In 1982, it had been suggested that irrationality was an inherent feature of procrastination. "Putting things off even until the last moment isn't procrastination if there is a reason to believe that they will take only that moment".^[20] Steel et al. explained in 2001, "actions must be postponed and this postponement must represent poor, inadequate, or inefficient planning".^[21]

Cultural Perspective

According to Holly McGregor & Andrew Elliot (2002); Christopher Wolters (2003), academic procrastination among portions of undergraduate students has been correlated to performance-avoidance orientation which is one factor of the four factor model of achievement orientation.^[5] Andrew Elliot and Judith Harackiewicz (1996) showed that students with a performance-avoidance orientation tend to be concerned with comparisons to their peers. These students procrastinate as a result of not wanting to look incompetent, or to avoid demonstrating a lack of ability and adopt a facade of competence for a task in front of their peers.^[5]

Gregory Arief Liem and Youyan Nie (2008) found that cultural characteristics are shown to have a direct influence on achievement orientation because it is closely aligned with most students cultural values and beliefs.^[5] Sonja Dekker and Ronald Fischer's (2008) meta-analysis across thirteen different societies revealed that students from Western cultures tend to be motivated more by mastery-approach orientation because the degree of incentive value for individual achievement is strongly reflective of the values of Western culture. By contrast, most students from Eastern cultures have been found to be performance-avoidance orientated. They often make efforts to maintain a positive image of their abilities, which they display while in front of their peers.^[5] In addition, Hazel Rose Markus and Shinobu Kitayama (1991) showed that in non-Western cultures, rather than standing out through their achievements, people tend to be motivated to become part of various interpersonal relationships and to fit in with those that are relevant to them.^[5]

Research by Sushila Niles (1998) with Australian (Western) students and Sri Lankan (Eastern) students confirm these differences, revealing that Australian students often pursued more individual goals, whereas Sri Lankan students usually desired more collaborative and social goals.^[5] Multiple studies by Kuo-Shu Yang and An-Bang Yu (1987, 1988, 1990) have indicated that individual achievement among most Chinese and Japanese students are measured by a fulfillment of their obligation and responsibility to their family network, not to an individual accomplishment.^[5] Yang and Yu (1987) have also shown that Collectivism and Confucianism are very strong motivators for achievement in many non-Western cultures because of their emphasis on cooperation in the family unit and community.^[5] Guided by these cultural values, it is believed that the individual intuitively senses the degree of pressure that differentiates his or her factor of achievement orientation.^[5]

Health perspective

To a certain degree it is normal to procrastinate and it can be regarded as a useful way to prioritize between tasks, due to a lower tendency of procrastination on truly valued tasks (for most people).^[22] On the other hand, excessive procrastination can become a problem and impede normal functioning. When this happens, procrastination has been found to result in health problems, stress,^[23] anxiety, sense of guilt and crisis as well as loss of personal productivity and social disapproval for not meeting responsibilities or commitments. Together these feelings may promote further procrastination and for some individuals procrastination becomes almost chronic. Such procrastinators may have difficulties seeking support due to procrastination itself, but also social stigma and the belief that task-aversion is caused by laziness, lack of willpower or low ambition. In some cases problematic procrastination might be a sign of some underlying psychological disorder, but not necessarily.^[13]

Research on the physiological roots of procrastination have been concerned with the role of the prefrontal cortex,^[24] the area of the brain that is responsible for executive brain functions such as impulse control, attention and planning. This is consistent with the notion that procrastination is strongly related to such functions, or a lack thereof. The prefrontal cortex also acts as a filter, decreasing distracting stimuli from other brain regions. Damage or low activation in this area can reduce one's ability to avert diversions, which results in poorer organization, a loss of attention, and increased procrastination. This is similar to the prefrontal lobe's role in ADHD, where it is commonly underactivated.^[25]

In a 2014 U.S. study surveying procrastination and impulsiveness in fraternal- and identical twin pairs, both traits were found to be "moderately heritable". The two traits were not separable at the genetic level (r_genetic = 1.0), meaning no unique genetic influences of either trait alone was found.^[26] The authors confirmed three constructs developed from the evolutionary hypothesis that procrastination arose as a by-product of impulsivity: "(a) Procrastination is heritable, (b) the two traits share considerable genetic variation, and (c) goal-management ability is an important component of this shared variation."^[26]

Management

Psychologist William J. Knaus estimated that more than 90% of college students procrastinate.^[27] Of these students, 25% are chronic procrastinators and typically abandon higher education (college dropouts).

Perfectionism is a prime cause for procrastination^[28] because pursuing unattainable goals (perfection) usually results in failure. Unrealistic expectations destroy self-esteem and lead to self-repudiation, self-contempt, and widespread unhappiness. To overcome procrastination, it is essential to recognize and accept the power of failure without condemning,^[29]{{Better source|reason=Principles of ACT|date=October 2015}} to stop focusing on faults and flaws and to set goals that are easier to achieve.

Behaviors and practices that reduce procrastination:{{citation needed|reason=post the paraphrased guideline/Rx protocol|date=October 2015}}

Making a plan to complete tasks in a rigid schedule format might not work for everyone. There is no hard-and-fast rule to follow such a process if it turns out to be counter-productive. Instead of scheduling, it may be better to execute tasks in a flexible, unstructured schedule which has time slots for only necessary activities.^[31]

Piers Steel suggests^[32] that better time management is a key to overcoming procrastination, including being aware of and using one's "power hours" (being a "morning person" or "night owl"). A good approach is to creatively utilize one's internal circadian rhythms that are best suited for the most challenging and productive work. Steel states that it is essential to have realistic goals, to tackle one problem at a time and to cherish the "small successes". Brian O'Leary supports that "finding a work-life balance...may actually help us find ways to be more productive", suggesting that dedicating leisure activities as motivation can increase one's efficiency at handling tasks.^[33] Procrastination is not a lifelong trait. Those likely to worry can learn to let go, those whom procrastinate can find different methods and strategies to help focus and avoid impulses.^[34][https://www.psychologytoday.com/us/blog/how-be-yourself/201808/5-ways-finally-stop-procrastinating]

After contemplating his own procrastination habits, philosopher John Perry authored an essay entitled "Structured Procrastination",^[35] wherein he proposes a "cheat" method as a safer approach for tackling procrastination: using a pyramid scheme to reinforce the unpleasant tasks needed to be completed in a quasi-prioritized order. In other words, the procrastinator should postpone tasks with a mental note that one feels to do while engaged in a work that requires their current attentional focus.

Severe and negative impact

For some people, procrastination can be persistent and tremendously disruptive to everyday life. For these individuals, procrastination may be symptomatic of a psychological disorder. Procrastination has been linked to a number of negative associations, such as depression, irrational behaviour, low self-esteem, anxiety and neurological disorders such as ADHD. Others have found relationships with guilt^[36] and stress.^[23] Therefore, it is important for people whose procrastination has become chronic and is perceived to be debilitating to seek out a trained therapist or psychiatrist to investigate whether an underlying mental health issue may be present.^[37]

With a distant deadline, procrastinators report significantly less stress and physical illness than do non-procrastinators. However, as the deadline approaches, this relationship is reversed. Procrastinators report more stress, more symptoms of physical illness, and more medical visits,^[23] to the extent that, overall, procrastinators suffer more stress and health problems.

Correlates

Procrastination has been linked to the complex arrangement of cognitive, affective and behavioral relationships from task desirability to low self esteem and anxiety to depression.^[9] A study found that procrastinators were less future-oriented than their non-procrastinator counterparts. This result was hypothesized to be in association with hedonistic perspectives on the present; instead it was found procrastination was better predicted by a fatalistic and hopeless attitude towards life.^[38]

A correlation between procrastination and eveningness was observed where individuals who had later sleeping and waking patterns were more likely to procrastinate.{{Citation needed|date=August 2018}} It has been shown that Morningness increases across lifespan and procrastination decreases with age.,^[13]^[39]

Perfectionism

Traditionally, procrastination has been associated with perfectionism: a tendency to negatively evaluate outcomes and one's own performance, intense fear and avoidance of evaluation of one's abilities by others, heightened social self-consciousness and anxiety, recurrent low mood, and "workaholism". However, adaptive perfectionists—egosyntonic perfectionism—were less likely to procrastinate than non-perfectionists, while maladaptive perfectionists, who saw their perfectionism as a problem—egodystonic perfectionism—had high levels of procrastination and anxiety.^[40]

In a regression analysis study of Steel, from 2007, it is found that mild to moderate perfectionists typically procrastinate slightly less than others, with "the exception being perfectionists who were also seeking clinical counseling".^[13]

Academic

According to an Educational Science Professor, Hatice Odaci, academic procrastination is a significant problem during college years in part because many college students lack efficient time management skills in using the Internet. Also, Odaci notes that most colleges provide free and fast twenty-four-hour Internet service which some students are not usually accustomed to, and as a result of irresponsible use or lack of firewalls these students become engulfed in distractions, and thus in procrastination.^[41]

"Student syndrome" refers to the phenomenon where a student will begin to fully apply themself to a task only immediately before a deadline. This negates the usefulness of any buffers built into individual task duration estimates. Results from a 2002 study indicate that many students are aware of procrastination and accordingly set binding deadlines long before the date for which a task is due. These self-imposed binding deadlines are correlated with a better performance than without binding deadlines though performance is best for evenly spaced external binding deadlines. Finally, students have difficulties optimally setting self-imposed deadlines, with results suggesting a lack of spacing before the date at which results are due.^[42]

In one experiment, participation in online exercises was found to be five times higher in the final week before a deadline than in the summed total of the first three weeks for which the exercises were available. Procrastinators end up being the ones doing most of the work in the final week before a deadline.^[21]

Other reasons cited on why students procrastinate include fear of failure and success, perfectionist expectations, as well as legitimate activities that may take precedence over school work, such as a job.^[43]

Procrastinators have been found to receive worse grades than non-procrastinators. Tice et al. (1997) report that more than one-third of the variation in final exam scores could be attributed to procrastination. The negative association between procrastination and academic performance is recurring and consistent. Howell et al. (2006) found that, though scores on two widely used procrastination scales^[9]^[44] were not significantly associated with the grade received for an assignment, self-report measures of procrastination on the assessment itself were negatively associated with grade.^[45]

In 2005, a study conducted by Angela Chu and Jin Nam Choi and published in the Journal of Social Psychology intended to understand task performance among procrastinators with the definition of procrastination as the absence of self-regulated performance, from the 1977 work of Ellis & Knaus. In their study they identified two types of procrastination: the traditional procrastination which they denote as passive, and active procrastination where the person finds enjoyment of a goal-oriented activity only under pressure. The study calls this active procrastination positive procrastination, as it is a functioning state in a self-handicapping environment. In addition, it was observed that active procrastinators have more realistic perceptions of time and perceive more control over their time than passive procrastinators, which is considered a major differentiator between the two types. But surprisingly, active and passive procrastinators showed similar levels of academic performance. The population of the study was college students and the majority of the sample size were women and Asian in origin. Comparisons with chronic pathological procrastination traits were avoided.^[46]

Different findings emerge when observed and self-reported procrastination are compared. Steel et al. constructed their own scales based on Silver and Sabini's "irrational" and "postponement" criteria. They also sought to measure this behavior objectively.^[21] During a course, students could complete exam practice computer exercises at their own pace, and during the supervised class time could also complete chapter quizzes. A weighted average of the times at which each chapter quiz was finished formed the measure of observed procrastination, whilst observed irrationality was quantified with the number of practice exercises that were left uncompleted. Researchers found that there was only a moderate correlation between observed and self-reported procrastination (r = 0.35). There was a very strong inverse relationship between the number of exercises completed and the measure of postponement (r = −0.78). Observed procrastination was very strongly negatively correlated with course grade (r = −0.87), as was self-reported procrastination (though less so, r = −0.36). As such, self-reported measures of procrastination, on which the majority of the literature is based, may not be the most appropriate measure to use in all cases. It was also found that procrastination itself may not have contributed significantly to poorer grades. Steel et al. noted that those students who completed all of the practice exercises "tended to perform well on the final exam no matter how much they delayed."

Procrastination is considerably more widespread in students than in the general population, with over 70 percent of students reporting procrastination for assignments at some point.^[47] A 2014 panel study from Germany among several thousand university students found that increasing academic procrastination increases the frequency of seven different forms of academic misconduct, i.e., using fraudulent excuses, plagiarism, copying from someone else in exams, using forbidden means in exams, carrying forbidden means into exams, copying parts of homework from others, fabrication or falsification of data and the variety of academic misconduct.^[48] This study argues that academic misconduct can be seen as a means to cope with the negative consequences of academic procrastination such as performance impairment.

See also

References

1. ^{{cite book|author1=Karen K. Kirst-Ashman|author2=Grafton H. Hull, Jr.|title=Empowerment Series: Generalist Practice with Organizations and Communities|url=https://books.google.com/books?id=RvK6DQAAQBAJ&pg=PA67|year=2016|publisher=Cengage Learning|isbn=978-1-305-94329-2|page=67}}
2. ^{{Cite journal|last=Ferrari|first=Joseph|date=June 2018|title=Delaying Disposing: Examining the Relationship between Procrastination and Clutter across Generations|journal=Current Psychology|volume=(New Brunswick, N.J.) (1046-1310), 37 (2)|issue=2|pages=426–431|doi=10.1007/s12144-017-9679-4}}
3. ^{{cite journal |url= https://eric.ed.gov/?id=EJ1146738 |title= Procrastination, Self-Esteem, Academic Performance, and Well-Being: A Moderated Mediation Model |author1= Duru, Erdinç |author2= Balkis, Murat |date= June 2017 |origyear=31 May 2017 |via= ed.gov |journal= International Journal of Educational Psychology |volume=6 |issue=2 |pages= 97–119|doi= 10.17583/ijep.2017.2584 }}
4. ^{{Cite book|title=Against the Gods: The remarkable story of risk|last=Bernstein|first=Peter|year=1996|isbn=|location=|pages=15}}
5. ^¹²³⁴⁵⁶⁷⁸⁹{{Cite journal|last=Ganesan|display-authors=etal|date=2014|title=Procrastination and the 2 x 2 achievement goal framework in Malaysian undergraduate students|url=https://www.academia.edu/download/44130586/PROCRASTINATION_AND_THE_2_x_2_ACHIEVEMENT_GOAL_FRAMEWORK.pdf|journal=Psychology in the Schools|volume=51|issue=5|pages=506–516|via=|doi=10.1002/pits.21760}}
6. ^{{Cite web|url=https://www.businessinsider.com/how-different-cultures-understand-time-2014-5|title=How Different Cultures Understand Time|last=Communications|first=Richard Lewis, Richard Lewis|website=Business Insider|access-date=2018-12-05}}
7. ^{{Cite journal|last=Mazur|first=James|date=1998|title=Procrastination by Pigeons with Fixed-Interval Response Requirements|journal=Experimental Analysis Behav|volume=69|issue=2|pages=185–197|pmc=1284653|pmid=9540230|doi=10.1901/jeab.1998.69-185}}
8. ^{{Cite journal|last=Mazur|first=J E|date=January 1996|title=Procrastination by pigeons: preference for larger, more delayed work requirements.|url=https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1350069/|journal=Journal of the Experimental Analysis of Behavior|volume=65|issue=1|pages=159–171|doi=10.1901/jeab.1996.65-159|issn=0022-5002|pmc=1350069|pmid=8583195}}
9. ^¹²{{cite web |author= Solomon, LJ |author2=Rothblum |url= http://rothblum.sdsu.edu/doc_pdf/procrastination/AcademicProcrastinationFrequency.pdf|date=1984|title=Academic Procrastination: Frequency and Cognitive-Behavioural Correlates|deadurl=no|archiveurl=https://web.archive.org/web/20160729211829/http://rothblum.sdsu.edu/doc_pdf/procrastination/AcademicProcrastinationFrequency.pdf|archivedate=2016-07-29}}
10. ^{{cite journal |last1=Gallagher |first1=Robert P. |last2=Golin |first2=Anne |last3=Kelleher |first3=Kathleen |journal=Journal of College Student Development |volume=33 |issue=4 |pages=301–10|date=1992 |title=The Personal, Career, and Learning Skills Needs of College Students|url=http://psycnet.apa.org/record/1993-03494-001}}
11. ^{{cite journal|author1=Norman A. Milgram |author2=Barry Sroloff |author3=Michael Rosenbaum |title=The Procrastination of Everyday Life|journal=Journal of Research in Personality|volume=22|number=2|date=June 1988|pages=197–212|doi=10.1016/0092-6566(88)90015-3}}
12. ^{{cite journal |doi=10.1037/0022-0663.99.1.12 |title=Doing the Things We Do: A Grounded Theory of Academic Procrastination |year=2007 |last1=Schraw |first1=Gregory |last2=Wadkins |first2=Theresa |last3=Olafson |first3=Lori |journal=Journal of Educational Psychology |volume=99 |pages=12–25}}
13. ^¹²³⁴{{cite journal |doi=10.1037/0033-2909.133.1.65 |url=http://studiemetro.au.dk/fileadmin/www.studiemetro.au.dk/Procrastination_2.pdf |title=The Nature of Procrastination: A Meta-Analytic and Theoretical Review of Quintessential Self-Regulatory Failure |year=2007 |last1=Steel |first1=Piers |journal=Psychological Bulletin |volume=133 |pages=65–94 |pmid=17201571 |issue=1 |deadurl=yes |archiveurl=https://web.archive.org/web/20130401132716/http://studiemetro.au.dk/fileadmin/www.studiemetro.au.dk/Procrastination_2.pdf |archivedate=2013-04-01 |citeseerx=10.1.1.335.2796 }}
14. ^{{cite web|author=Pychyl, T.|date=20 February 2012|accessdate=20 February 2012|title=The real reasons you procrastinate — and how to stop|publisher=The Washington Post|url=https://www.washingtonpost.com/news/wonk/wp/2016/04/27/why-you-cant-help-read-this-article-about-procrastination-instead-of-doing-your-job/}}
15. ^{{Cite book| publisher = Penguin Group| isbn = 978-1-58542-552-5| last = Fiore| first = Neil A| title = The Now Habit: A Strategic Program for Overcoming Procrastination and Enjoying Guilt-Free Play| location = New York| year = 2006| page = 5}}
16. ^{{cite book |last=Steel |first=Piers |title=The Procrastination Equation: How to Stop Putting Things Off and Start Getting Stuff Done |year=2010 |publisher=HarperCollins |location=New York |isbn=978-0-06-170361-4}}{{Page needed|date=January 2012}}
17. ^{{cite journal |doi=10.1111/j.1520-8583.2007.00127.x |title=Self-Deception As Pretense |year=2007 |last1=Gendler |first1=Tamar Szabó |journal=Philosophical Perspectives |volume=21 |pages=231–58}}
18. ^{{cite book|last=Gosling|first=J.|title=Weakness of the Will|year=1990|publisher=Routledge|location=New York}}{{Page needed|date=January 2012}}
19. ^{{cite journal |doi=10.1016/j.paid.2005.05.010 |title=A Closer Look at the Relationships Among Trait Procrastination, Neuroticism, and Conscientiousness |year=2006 |last1=Lee |first1=Dong-gwi |last2=Kelly |first2=Kevin R. |last3=Edwards |first3=Jodie K. |journal=Personality and Individual Differences |volume=40 |pages=27–37}}
20. ^Sabini, J. & Silver, M. (1982) Moralities of everyday life, p. 128
21. ^¹²{{cite journal | last1 = Steel | first1 = P. | last2 = Brothen | first2 = T. | last3 = Wambach | first3 = C. | year = 2001 | title = Procrastination and Personality, Performance and Mood | journal = Personality and Individual Differences| volume = 30| issue = | pages = 95–106| doi=10.1016/S0191-8869(00)00013-1}}
22. ^{{cite web|last=Pavlina|first=Steve|title=How to Fall in Love with Procrastination|url=http://www.stevepavlina.com/blog/2010/06/how-to-fall-in-love-with-procrastination/|accessdate=18 April 2013|deadurl=no|archiveurl=https://web.archive.org/web/20130419055057/http://www.stevepavlina.com/blog/2010/06/how-to-fall-in-love-with-procrastination/|archivedate=19 April 2013|date=2010-06-10}}
23. ^¹²{{cite journal | last1 = Tice | first1 = DM | last2 = Baumeister | first2 = RF | year = 1997 | title = Longitudinal Study of Procrastination, Performance, Stress, and Health: The Costs and Benefits of Dawdling | jstor = 40063233 | journal = Psychological Science| volume = 8| issue = 6| pages=454–58 | doi=10.1111/j.1467-9280.1997.tb00460.x| citeseerx = 10.1.1.461.1149 }}
24. ^{{cite book|last=Evans|first=James R.|title=Handbook of Neurofeedback: Dynamics and Clinical Applications|url=https://books.google.com/books?id=20oUOtjs9DkC&pg=PA293|accessdate=8 October 2010|date=8 August 2007|publisher=Psychology Press|isbn=978-0-7890-3360-4|page=293|deadurl=no|archiveurl=https://web.archive.org/web/20120601195833/http://books.google.com/books?id=20oUOtjs9DkC&pg=PA293|archivedate=1 June 2012}}
25. ^{{cite journal |pmid=2775008 |year=1989 |last1=Strub |first1=RL |title=Frontal Lobe Syndrome in a Patient with Bilateral Globus Pallidus Lesions |volume=46 |issue=9 |pages=1024–27 |journal=Archives of Neurology |doi=10.1001/archneur.1989.00520450096027}}
26. ^¹{{cite journal|last=Gustavson|first=Daniel E|author2=Miyake A|author3=Hewitt JK|author4=Friedman NP|title=Genetic Relations Among Procrastination, Impulsivity, and Goal-Management Ability Implications for the Evolutionary Origin of Procrastination|journal=Psychological Science|date=4 April 2014|volume=25|doi= 10.1177/0956797614526260|pmid=24705635|issue=6|pages=1178–88|pmc=4185275}}
27. ^Ellis and Knaus, 1977
28. ^Hillary Rettig (2011). The 7 Secrets of the Prolific: The Definitive Guide to Overcoming Procrastination, Perfectionism, and Writer's Block
29. ^James Prochaska, 1995
30. ^¹²³{{Cite journal|last=Macan|first=Therese Hoff|date=1994|title=Time management: Test of a process model|journal=Journal of Applied Psychology|volume=79|issue=3|pages=381–391|doi=10.1037/0021-9010.79.3.381|issn=0021-9010|citeseerx=10.1.1.455.4283}}
31. ^Burka & Yuen (1990). [https://books.google.com/books?id=fMvdh98vNmAC&printsec=frontcover#v=onepage&q&f=false Procrastination: Why You Do It, What To Do About It]
32. ^The Procrastination Equation, 2012
33. ^{{Cite news|url=https://hbswk.hbs.edu/item/work-life-is-productivity-in-the-balance|title=Work-Life: Is Productivity in the Balance?|date=2004-07-05|work=HBS Working Knowledge|access-date=2018-08-24}}
34. ^{{Cite web|url=https://www.psychologytoday.com/blog/how-be-yourself/201808/5-ways-finally-stop-procrastinating|title=5 Ways to Finally Stop Procrastinating|website=Psychology Today|access-date=2019-02-27}}
35. ^{{Cite journal|url=http://www.chronicle.com/article/How-to-ProcrastinateStill/93959|title=How to Procrastinate and Still Get Things Done|last=Perry|first=John|authorlink=John Perry (philosopher)|date=February 23, 1996|journal=The Chronicle of Higher Education|archive-url=https://web.archive.org/web/20170218090944/http://www.chronicle.com/article/How-to-ProcrastinateStill/93959|archive-date=February 18, 2017|dead-url=no|access-date=February 18, 2017}}
36. ^{{cite journal | last1 = Pychyl | first1 = TA | last2 = Lee | first2 = JM | last3 = Thibodeau | first3 = R | last4 = Blunt | first4 = A | year = 2000 | title = Five Days of Emotion: An Experience Sampling Study of Undergraduate Student Procrastination (special issue) | url = http://psycnet.apa.org/index.cfm?fa=search.displayRecord&uid=2002-10572-019 | journal = Journal of Social Behavior and Personality | volume = 15 | issue = | pages = 239–54 }}
37. ^{{Cite journal|last=Schouwenburg|first=H.C.|year=1993|title=Trait procrastination, time management, and academic behavior|url=https://www.scopus.com/record/display.uri?eid=2-s2.0-21344492853&origin=inward&txGid=8922AD549640D5B2BACA406E901F44B5.wsnAw8kcdt7IPYLO0V48gA%3a1|journal=Trait Procrastination, Time Management, and Academic Behavior|volume=8|pages=647–62|via=}}
38. ^{{cite journal | last1 = Jackson | first1 = T. | last2 = Fritch | first2 = A. | last3 = Nagasaka | first3 = T. | last4 = Pope | first4 = L. | year = 2003 | title = Procrastination and Perceptions of Past, Present, and Future | url = http://psycnet.apa.org/index.cfm?fa=search.displayRecord&uid=2004-15383-003 | journal = Individual Differences Research | volume = 1 | issue = | pages = 17–28 }}
39. ^{{cite journal | last1 = Duffy | first1 = JF | last2 = Czeisler | first2 = CA | year = 2002 | title = Age-Related Change in the Relationship Between Circadian Period, Circadian Phase, and Diurnal Preference in Humans | journal = Neuroscience Letters| volume = 318| issue = 3| pages = 117–120 | doi = 10.1016/S0304-3940(01)02427-2 }}
40. ^{{cite web|url=http://www.rps.psu.edu/sep96/almost.html|title=The Almost Perfect Definition|author=McGarvey, Jason A.|year=1996|archiveurl=https://web.archive.org/web/20060313153133/http://www.rps.psu.edu/sep96/almost.html|archivedate=2006-03-13|deadurl=yes}}
41. ^{{cite journal|last1=Odaci|first1=Hatice|title=Academic Self-Efficacy and Academic Procrastination as Predictors of Problematic Internet Use in University Students|date=August 1, 2011|url=https://www.researchgate.net/file.PostFileLoader.html?id=5624d9855cd9e38cd78b456e&assetKey=AS%3A286236704034819%401445255556988}}
42. ^{{cite journal|last=Ariely|first=Dan|author-link=Dan Ariely|last2=Wertenbroch|first2=Klaus|year=2002|title=Procrastination, Deadlines, and Performance: Self-Control by Precommitment|journal=Psychological Science|volume=13|issue=3|pages=219–224|url=http://web.mit.edu/ariely/www/MIT/Papers/deadlines.pdf|doi=10.1111/1467-9280.00441|pmid=12009041|deadurl=no|archiveurl=https://web.archive.org/web/20100215131540/http://web.mit.edu/ariely/www/MIT/Papers/deadlines.pdf|archivedate=2010-02-15}}
43. ^{{cite web |url=http://writingcenter.unc.edu/resources/handouts-demos/writing-the-paper/procrastination |title=Procrastination |publisher=The Writing Center at UNC-Chapel Hill |website=writingcenter.unc.edu |accessdate=2012-03-10 |deadurl=no |archiveurl=https://web.archive.org/web/20120318150005/http://writingcenter.unc.edu/resources/handouts-demos/writing-the-paper/procrastination |archivedate=2012-03-18 }}
44. ^{{cite web |last1=Tuckman |first1=BW |title=The Development and Concurrent Validity of the Procrastination Scale |url=http://psycnet.apa.org/index.cfm?fa=search.displayRecord&UID=1991-32090-001 |website=psycnet.apa.org |publisher=PsycNET |accessdate=26 December 2018 |ref=harv |date=1991}}
45. ^{{cite journal | last1 = Howell | first1 = AJ | last2 = Watson | first2 = DC | last3 = Powell | first3 = RA | last4 = Buro | first4 = K | year = 2006 | title = Academic Procrastination: The Pattern and Correlates of Behavioral Postponement | journal = Personality and Individual Differences| volume = 40| issue = 8| pages = 1519–30| doi=10.1016/j.paid.2005.11.023}}
46. ^{{Cite journal|last=Hsin Chun Chu|first=Angela|last2=Nam Choi|first2=Jin|title=Rethinking Procrastination: Positive Effects of "Active" Procrastination Behavior on Attitudes and Performance|journal=The Journal of Social Psychology|volume=145|issue=3|pages=245–64|doi=10.3200/socp.145.3.245-264|pmid=15959999|year=2005|citeseerx=10.1.1.502.2444}}
47. ^{{cite web|url=http://www.psychologytoday.com/blog/media-spotlight/201307/getting-around-procrastination|title=Getting Around to Procrastination|accessdate=10 October 2014}}
48. ^{{cite journal | last1 = Patrzek | first1 = J. | last2 = Sattler | first2 = S. | last3 = van Veen | first3 = F. | last4 = Grunschel | first4 = C. | last5 = Fries | first5 = S. | year = 2014 | title = Investigating the Effect of Academic Procrastination on the Frequency and Variety of Academic Misconduct: A Panel Study | url = | journal = Studies in Higher Education | volume = 40| issue = 6| pages = 1–16| doi = 10.1080/03075079.2013.854765 }}