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Abstract


Development of the A Procrastination Scale Using Item Response Theory and Examination of Its Psychometric Characteristics

Although there are several measures to assess procrastination, most of the research has focused on academic domain and the preponderance of available measures is centered on academic procrastination. Due to the notable paucity of alternative measures for general population, this study aimed to develop a procrastination scale and examine its basic psychometric properties. For this purpose, two studies were conducted. In the first study, 77 items was prepared in accordance with the related studies, and administered to 165 female and 344 male participants, a total of 509 people ranging in age between 18 and 65. Based on the findings from the preliminary study, the item pool was subsequently reevaluated in order to enhance its coverage and the initial number was raised to 120 by including new items. The second study was conducted with 1065 female and 806 male participants, a total of 1871 people between the ages of 17 and 83. In the second study, 20 items were selected using the Item Response Theory, and the latest version of the form was named as A Procrastination Scale. Cronbach Alfa internal consistency reliability coefficient for the scale was computed 0.94 in the main application, 0.92 a week later, and 0.93 two weeks later. Correlation coefficient among the test-retest administrations with one and two weeks of intervals was determined 0.80. In order to examine the criterion related validity, Melbourne Decision Making Questionnaire I-II and the Five Factor Personality Inventory were applied alongwith the A Procrastination Scale. Correlation coefficient of -0.63 was determined for the Conscientiousness factor of the Five Factor Model of Personality. In addition, it was observed that correlations ranged between 0.23 and 0.43 for the subscale scores of the Melbourne Decision Making Questionnaire. Although the need for further validity studies, initial results shows that the scale met the basic psychometric requirements.



Keywords
procrastination, procrastination scale, situational procrastination, trait procrastination



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