TY  - JOUR
A1  - Malesza, Marta
A1  - Ostaszewski, Paweł
T1  - Assessing individual differences in discounting
BT  - construction and initial validation of the discounting inventory
JF  - Current psychology
N2  - The purpose of the project was to develop the Discounting Inventory (DI), a measure of individual differences in delay, probability, effort, and social discounting, all related to behavioral impulsivity. Over 400 items relating to four types of discounting were generated. Next, a study followed by a series of psychometric analyses of data obtained from a group of 2843 individuals was conducted. Principal Component Analysis yielded a four-factor structure of data, reflecting the four types of discounting. The results of Confirmatory Factor Analysis showed good fit of the four-factor model to data. Through several iterations of retaining and deleting items on the basis of their component loadings, item intercorrelations, and contribution to coefficient alphas, the total number of items was reduced to 48. The final 48-item version of the inventory has satisfactory psychometric characteristics, including Cronbach's alpha and test-retest stability. In addition, significant correlations were observed between the DI and traditional discounting instruments, suggesting that the DI measures a construct similar to the behavioral discounting process. The development of the tool was based on the assumption that discounting is a personality trait. However, the present data suggest that discounting may reflect more a state than trait function.
KW  - scale construction
KW  - personality trait
KW  - impulsivity
KW  - discounting
Y1  - 2017
U6  - https://doi.org/10.1007/s12144-017-9754-x
SN  - 1046-1310
SN  - 1936-4733
VL  - 39
IS  - 1
SP  - 207
EP  - 219
PB  - Springer
CY  - New York
ER  - 
TY  - GEN
A1  - Malesza, Marta
A1  - Ostaszewski, Paweł
T1  - Assessing individual differences in discounting
BT  - construction and initial validation of the Discounting Inventory
T2  - Postprints der Universität Potsdam Humanwissenschaftliche Reihe
N2  - The purpose of the project was to develop the Discounting Inventory (DI), a measure of individual differences in delay, probability, effort, and social discounting, all related to behavioral impulsivity. Over 400 items relating to four types of discounting were generated. Next, a study followed by a series of psychometric analyses of data obtained from a group of 2843 individuals was conducted. Principal Component Analysis yielded a four-factor structure of data, reflecting the four types of discounting. The results of Confirmatory Factor Analysis showed good fit of the four-factor model to data. Through several iterations of retaining and deleting items on the basis of their component loadings, item intercorrelations, and contribution to coefficient alphas, the total number of items was reduced to 48. The final 48-item version of the inventory has satisfactory psychometric characteristics, including Cronbach’s alpha and test–retest stability. In addition, significant correlations were observed between the DI and traditional discounting instruments, suggesting that the DI measures a construct similar to the behavioral discounting process. The development of the tool was based on the assumption that discounting is a personality trait. However, the present data suggest that discounting may reflect more a state than trait function.
T3  - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - 549 
KW  - scale construction
KW  - personality trait
KW  - impulsivity
KW  - discounting
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-428811
SN  - 1866-8364
IS  - 549
ER  -