Self-selection biases in correlational studies based on questionnaires

It is commonly held that even where questionnaire response is poor, correlational studies are affected only by loss of degrees of freedom or precision. We show that this supposition is not true. If the decision to respond is correlated with a substantive variable of interest, then regression or analysis of variance methods based upon the questionnaire results may be adversely affected by self-selection bias. Moreover such bias may arise even where response is 100%. The problem in both cases arises where selection information is passed to the score indirectly via the disturbance or individual effects, rather than entirely via the observable explanatory variables. We suggest tests for the ensuing self-selection bias and possible ways of handling the ensuing problems of inference.The author would like to thank members of the Psychology Department at UWA for references on the illustrative example, namely the effects of sex-stereotyping on achievements in mathematics; thanks are also due to the anonymous reviewers whose comments resulted in material improvements to the paper.     

Personality traits,coping strategies and quality of life in patients of hepatitis C

IntroductionIn recent decades, hepatitis has become a community health issue. A severe, asymptomatic and unobserved acute disease could be resulted by HCV and it could be treated completely in few cases or could result in chronic hepatitis.ObjectiveThe current research investigated the relationship among personality traits, coping strategies and quality of life in patients of hepatitis C in Pakistan.MethodTotal 102 patients of HCV were selected from government, semi-government and private hospitals. Mental Health Screening Questionnaire (Mirza & Kausar, 2008) was used to screen the patients. The Urdu versions of Big Five Inventory (John & Srivastava, 1999), Coping Strategies Questionnaire (Kausar & Munir, 2004) and Quality of Life-BREF (1997) were used to measure the study variables.ResultsThe results showed that extraversion had positive relationship with the subscales of quality of life except physical health. Conscientiousness had positive relationship with physical and psychological health. Neuroticism had negative relationship with all the domains of quality of life. Openness to experience had positive relationship with psychological health and environment. religious coping and conscientiousness positively predicted physical health, whereas, agreeableness was the negative predictor of physical health. Psychological health and social relationships were positively predicted by active focused coping, whereas, neuroticism negatively predicted psychological health.ConclusionThe results of present research indicated significant contribution of personality traits and coping strategies in maintaining quality of life of HCV patients. The clinical implications to improve quality of life of HCV patients are discussed in light of results.     

French validation of the Twenty-Item Value Inventory

IntroductionPersonal values are important for understanding psychological phenomena by serving as predictors of individuals’ attitudes and behavior. The Twenty-Item Value Inventory (TwIVI, Sandy et al., 2017) was developed to assess values with items from the Portrait Values Questionnaire (PVQ, Schwartz et al., 2001).ObjectiveThe goal of this study was to assess the reliability and validity of the French version of the TwIVI.MethodTwo French-Canadian samples of adults (N1 = 825; N2 = 429) were recruited in order to test the reliability and validity of the TwIVI.ResultsResults revealed that the French version of the TwIVI showed satisfying temporal stability, convergence validity with the PVQ, and concurrent validity with personality traits. Some issues were observed for internal consistency and structural validity, assessed with both multidimensional scaling and exploratory structural equation modeling.ConclusionOverall, these findings partially support the psychometric qualities of the French version of the TwIVI. Implications for theory and research on values are discussed.     

The detection of malingering in neuropsychological assessment

Although malingering, or the manipulation of data by the patient, is a problem commonly faced by neuropsychologists, there has been little systematic investigation of this problem. This paper reviews the literature on the detection of malingering in assessment instruments commonly used by clinical neuropsychologists. Criticism of previous research is discussed, and suggestions are made both for future research and for clinical practice.     

Tachistoscopic and questionnaire methods for the measurement of psychological defences

Only few attempts have been made to compare different methods aiming at quantifying defensive strategies. In this study the tachistoscopic Defence Mechanism Test (Kragh, 1960b and 1985) is compared to paper-and-pencil tests of defence. There were virtually no correlations between the DMT and the other measures of defence. This may indicate that the concept of defence is a highly complex one. It is suggested that the Defence Mechanism Test may be measuring primary defence while defence questionnaires may be assessing more secondary forms of defence. The two questionnaires used for assessing defence correlated significantly, while a scale for social desirability showed no correlation with DMT or the two defence questionnaires.     

缺陷儿童人格诊断量表的修订

缺陷儿童人格诊断量表是日本特殊教育领域的一种专门用于测量缺陷儿童人格的著名量表。作者用三年时间对其进行了修订,建立了包括弱智、聋哑、盲等缺陷儿童的中国常模。该量表具有较高的信度与效度,是一个较好的心理测量工具。     

Personality disorder correspondence between the million behavioral health inventory (MBHI) and the minnesota multiphasic personality inventory (MMPI)

The MBHI and MMPI personality disorder scales were analyzed for convergent and discriminant validity. Correlational data demonstrated that six of the eight scales were significantly related, while the remaining two scales approached significance. Further analyses of these data, however, demonstrated that none of the scales correlated significantly better with its convergent scale compared to nonconvergent scales. The MBHI classified significantly more of the sample as personality disordered (93%) compared to the MMPI personality disorder scales (17%). Furthermore, the MBHI tended to describe the sample as falling within the Anxious cluster of personality disorders, whereas the MMPI described them within the Dramatic cluster. Single scale codetype correspondence was found to be 15%, while two-point concordance was 12.5%, indicating very low congruence between personality style codetypes. These two measures do not appear to be measuring the same personality style constructs.     

Factor structure of the basic personality inventory with incarcerated offenders

The item and scale factor structure of the Basic Personality Inventory (BPI) was examined in a sample of 486 offenders incarcerated for violent and sexual crimes. Separate principal-component analyses of the items for each of the 11 clinical scales, critical item scale, and social desirability scale indicated a one-dimensional factor solution for all scales except Depression and Persecutory Ideation. The Depression scale's two factors were Hopelessness and Depressive Affect and the Persecutory Ideation scale's two factors were General Paranoia and Perception of External Control. Although the factors for these two scales may assist in interpretation, the correlations between the factors and the total score of their respective scale were high. Confirmatory factor analysis of the 220 items from the 11 clinical scales supported the factorial logic of the scoring key. Analysis of the 11 clinical scales resulted in two factors: General Psychopathology/Adjustment and Antisocial Orientation. The results suggest that all but two scales can be viewed as unidimensional thereby allowing for a straightforward clinical interpretation. These analyses support the internal structure of the BPI and lend credence to external validity work with forensic populations.     

Diagnosing posttraumatic stress disorder with the MMPI clinical scales: A review of the literature

A review of the literature resulted in 21 published studies that reported mean MMPI profile patterns for PTSD patients. Of these, six (29%) reported that the mean 8-2 profile pattern significantly differentiated PTSD patients from non-PTSD patients. The majority of studies found additional PTSD profile patterns reflecting nearly all of the MMPI clinical scales. The data indicate some common group profile patterns for inpatient veterans, prisoner's of war, and inpatient veteran substance abusers. The results also support the hypothesis that there is a continuum from inpatient to outpatient and veteran to civilian populations that corresponds with both symptom and stressor severity. It is concluded that although there is some typicality in similar populations, clinicians should expect heterogeneous MMPI profiles from PTSD patients representing a diversity of clinical symptoms and styles.