Qualitative variations in personality inventories: subjective understandings of items in a personality inventory

Most studies using personality inventories do not take individual, subjective understandings of the items into account. The present study is one of the few to have investigated the quality of individuals’ psychological processes when making the Likert-like responses often used in psychological inventories. Respondents were asked to elaborate verbally on their Likert item responses to the 10-item short version of the Big Five Inventory. A common assumption about personality inventories is that there is a relatively homogenous understanding of the items and, in particular, the rating scales across respondents. However, our results suggest that the same item responses to a given item can reflect a variety of qualities across individuals’ understandings. At the same time, similar understandings and ways of relating to an item can lead to different item responses. Such findings have substantial implications for quantitative personality studies as well as quantitative survey or questionnaire studies, in general.     

Assessing young adolescents' personality with the five-factor personality inventory

The Five-Factor Personality Inventory (FFPI) assesses a person's position on the (Dutch) psycholexically based Big Five factors: Extraversion, Agreeableness, Conscientiousness, Emotional Stability, and Autonomy. FFPI factor scores are reliable and valid if ratings are made by adults. The present study yields preliminary evidence of whether young adolescents provide reliable and valid self-ratings on this instrument or whether this depends on their cognitive ability level. The sample consisted of a large and representative cohort of youngsters with a mean age of 13 years. The adult structure of the FFPI was generally well replicated, across all ability levels represented in the study. The findings further suggest that young adolescents' factor scores are construct-valid and sufficiently reliable to be used in (group) research settings. However, for reports on individual profiles and decision making, an adolescent's cognitive ability level would need to be rather high. Even then, measuring Autonomy seems challenging.     

Psychological components of responses to interest inventory items

This study tests the relevance of 10 psychological traits that are assumed to exemplify responses to the items of INFORIZON, an occupational interest inventory. To accomplish this goal, the author analyzed the responses to the interest items based on a sample of 824 participants (17–25 years old), with an assessment of the items based on psychological traits using another French sample (147 participants) in the same age category. The results of multiple linear regression analyses supported most of the hypotheses presented in this study.     

The process of responding to personality items: Inconsistent responses to repeated presentation of identical items

A promising approach to understanding the processes involved when subjects respond to personality items is provided by the investigation of the causes of inconsistent responses when subjects answer the same item on two occasions. Among these causes are the properties of the item. Previous item research focused almost exclusively on properties which are not highly specific to the item, such as endorsement rate (ER) and social desirability scale value (SDSV). Although past studies found that items with ‘extreme’ SDSVs and/or ERs elicit fewer inconsistencies, these studies ignored more item-specific properties such as item content and item ambiguity. The present study demonstrates that contrary results regarding consistency may be obtained when more item-specific properties are taken into consideration. These results are interpreted as evidence that certain kinds of item content can increase the indecision and conflict that characterize some subjects' response processes.     

Common items and reliability in personality measurement

Most psychological tests and inventories, particularly in personality and attitude measurement, contain common items, that is, various subscales of the test or inventory may share one or more items in common. Surprisingly, the role of common items in such a fundamental personality test attribute as reliability is not known. The present report specifically considered common-item contributions to test internal consistency reliability using extant data from the California Psychological Inventory. No negative contribution of item overlap was found. To the contrary, it was concluded that the use of common items is an economical technique for increasing the total number of items in the scales, thus increasing scale internal reliabilities without increasing the overall number of items in the inventory.     

A psychometric investigation of Eysenck's personality inventory

Eysenck's personality inventory (EPI) was administered to 653 females and 666 males. Item analyses were carried out for the subsamples and the combined sample. In addition hierarchical oblique factor analysis was applied to the data. The purpose of both item and factor analysis was to examine the psychometric properties of the EPI in regard to (a) the homogeneity of the scales, in terms both of internal and external item-scale relationships (b) the univocality of the scales assessed in factor analytic terms. It was found that the neuroticism scale was superior to the extraversion scale in both these respects.     

Self-reference in memory: Recognition of personality items

The hypothesis that the “self” concept is active in memory was tested in a series of recognition experiments involving first- and third-person sentences under several instructional conditions. The results confirmed the hypothesis and indicated a degree of sentence specificity for the effect. These results were interpreted as congruent with the notion that the “self” can be seen as a cognitive structure with both a memory component as well as an involvement in the evaluation and processing of incoming materials.     

The making of a personality inventory: Help from the WWW

Data collected electronically from the World-Wide Web (WWW) in two samples (n=429 and 1,657) were compared with traditional paper-and-pencil measure data from two university samples (n=760 and 148) in three psychometric studies of a new measure of self-trust, the Self-Trust Questionnaire. With the exception of scale score variance, which was larger in WWW samples, psychometric properties of the scale were comparable across samples collected from the two sources. WWW samples were more similar to psychology student samples (predominantly young females) than to typical Internet users. On balance, findings indicate that the advantages of the WWW as a data source, including large heterogeneous samples, outweigh problems with data accuracy and generalizability, making the WWW an attractive source of data for researchers developing self-report personality inventories.     

Perfectionism and multiphasic personality inventory (MMPI) indices of personality disorder

The present research tested the hypothesis that personal and social aspects of the perfectionism construct are related differentially to indices of personality disorders. A sample of 90 psychiatric patients was examined with respect to their scores on the Multidimensional Perfectionism Scale (MPS) and the personality disorder subscales (PDS) of the Minnesota Multiphasic Personality Inventory. The MPS provides measures of self-oriented, other-oriented, and socially prescribed perfectionism, whereas the PDS assess levels of various personality disorder symptoms. Zero-order and partial correlations indicated that the perfectionism dimensions of the MPS were related to various subscales of the PDS and, perhaps more importantly, that the findings vary as a function of the perfectionism dimension in question. The results are discussed in terms of the importance of perfectionism in personality disorder symptom patterns.     

Psychometric evaluation of the depressive personality disorder inventory

The purpose of this study was to evaluate the psychometric properties of the Depressive Personality Disorder Inventory (DPDI; Huprich, Margrett, Barthelemy, & Fine, 1996). The DPDI was found to have strong internal consistency in both an undergraduate and a veteran, psychiatric outpatient population. The DPDI had significant, positive correlations with other measures of depressive personality, supporting its convergent validity. These relationships remained even after controlling for state-like depression, suggesting that the DPDI has incremental validity. The DPDI also significantly predicted scores on measures of interpersonal loss, even after controlling for state-like depression, suggesting that the DPDI has good construct validity. In support of discriminant validity, the DPDI was more correlated with another measure of depressive personality than it was with measures of other personality disorders. Finally, the DPDI had strong diagnostic efficiency statistics: (a) Sensitivity = .82, (b) Specificity = .80, (c) Positive Predictive Power = .75, (d) Negative Predictive Power = .86, and (e) Overall Diagnostic Power = .81. It appears that the DPDI has good psychometric properties.     

The narcissistic personality inventory: applicability in a Swedish population sample

A Swedish translation of the 40-item Narcissistic Personality Inventory (NPI) was mailed to 410 participants, aged 21-61 years, randomly sampled from the Swedish general population. The participation rate was 62%. The applicability of a previously published seven-factor structure (Raskin & Terry) and a four-factor structure (Emmons) was investigated. The factor structure found in the present in the Swedish sample corresponded better with Emmons's version. Therefore the four-factor structure was chosen. Because the correspondence to Emmons's factor structure was not perfect, a revised NPI for Swedish use was constructed. The total scale score is usually used, although the Swedish NPI includes four subscales: Leadership/Power, Exhibitionism/Self-admiration. Superiority/Arrogance, and Uniqueness/Entitlement. For the total scale, the internal consistency (Cronbach's alpha) was 0.80 and the test-retest correlation was 0.93. The total scale score correlated with self-esteem as well as the interpersonal style and emotional aspects of psychopathy, supporting the validity of the scale.