TY  - JOUR
A1  - Malesza, Marta
T1  - The reduced discounting inventory
BT  - construction and initial validation
JF  - Current psychology
N2  - In two studies, the aim of this research was to develop and validate a Polish version of the reduced Discounting Inventory. In Study 1 (N = 623) items extraction from the 48-item DI was based upon item-total correlation and items with highest coefficients were considered. The reduced Discounting Inventory resulted in sixteen items. Cronbach's a coefficient was .78, and the item-total correlations ranged between .59 and .77. The correlation between Polish versions of reduced Discounting Inventory and longer 48-item Discounting Inventory was .85. Next, the reduced Discounting Inventory was evaluated in terms of factorial and construct validity. The structure of the instrument was analysed by Confirmatory Factor Analyses procedure. It indicated that the four-factor structure had the best fit to the data. Additionally, we show that this reduced Discounting Inventory closely parallels the longer 48-item inventory its relation to traditional discounting measures using pairs of hypothetical choices (expect for the delay discounting subscale). Finally, in study 2, the test-retest reliability of the reduced Discounting Inventory over a 3-month interval was assessed (247 subjects of the 623 individuals who participated in Study 1). Results indicated good stability of the reduced measure (>= .88). It is concluded that the reduced Discounting Inventory has notable psychometric properties and that it can serve as an alternative measure of discounting when situations do not allow the use of longer inventories.
KW  - Discounting inventory
KW  - Reduced measure
KW  - Reliability
KW  - Validity
Y1  - 2018
SN  - 1046-1310
SN  - 1936-4733
VL  - 40
IS  - 2
SP  - 545
EP  - 552
PB  - Springer
CY  - New York
ER  - 
TY  - JOUR
A1  - Malesza, Marta
A1  - Schröder-Abé, Michela
T1  - The convergent, discriminant, and incremental validity of the Discounting Inventory compared to the traditional discounting measures
JF  - Journal of public health
N2  - Aim The Discounting Inventory was developed to provide researchers and practitioners with a standardized tool to asses individual differences in delay, probabilistic, effort and social discounting, all related to behavioral impulsivity. Convergent and discriminant validity of the Discounting Inventory was evaluated by comparing its associations with external variables to those obtained using standardized discounting measures with the same external variables. Subjects and methods A sample of 347 volunteers was examined. The first questionnaire completed by all participants was the Discounting Inventory. Individuals also completed the traditional discounting measure using pairs of hypothetical choices. The external measures included the Sensation Seeking Scale, Barratt Impulsiveness Scale, Eysenck Impulsivity Venturesomeness Empathy Questionnaire, Eysenck Personality Questionnaire-Revised, and Temperament and Character Inventory. Results The results revealed that although almost all correlations were significant for both the Discounting Inventory and the traditional discounting measures, most of the correlations between external variables and the Discounting Inventory were significantly higher than those between external variables and traditional discounting measures. However, both discounting measures were most strongly correlated with external measures of impulsivity, which is not surprising given the fact that discounting is seen as a behavioral impulsivity. Finally, most relationships between the Discounting Inventory and external variables were incrementally valid over the traditional discounting measures. Conclusion The Discounting Inventory can help to diagnose problems with behavioral impulsivity.
KW  - Discounting inventory
KW  - Convergent validity
KW  - Discriminant validity
KW  - Incremental validity
KW  - Discounting
Y1  - 2020
U6  - https://doi.org/10.1007/s10389-020-01306-y
SN  - 2198-1833
SN  - 1613-2238
VL  - 30
IS  - 2
SP  - 423
EP  - 433
PB  - Springer
CY  - Berlin ; Heidelberg
ER  -