MMPI Scale Five: its meaning, or lack thereof

As a widely used test of personality and psychopathology, the MMPI play an important part in making decisions that affect people's lives. The addition of "cookbooks" and, more recently, computer-generated output based on MMPI scale scores provide even the most unsophisticated user with what appear to be credible and valid interpretations of scale and profile variations. A comprehensive review of the literature on MMPI Scale Five (MJ) calls into question generalizations arising from scores on the scale. Empirical research provides no consistent meaning for any score level on the scale. Attempts to map the structure of the scale result in numerous factors and account for, at best, 30% of the variance. Discussion focuses on the shortcomings of the scale as well as the assumptions on which it was developed. Conclusions suggest that the concept of sex difference itself is inappropriately defined and establishes artificial boundaries.     

The effect of visual-vestibular conflict on the latency of steady-state visually induced subjective rotation

Two experiments were carried out to test the hypothesis that the long onset latency of steady-state subjective rotation induced by rotating a tall striped drum around a stationary observer is the result of visual-vestibular conflict. A reduction of this conflict should, therefore, reduce the length of the latency period. In Experiment 1, visual-vestibular conflict was reduced by providing the observers with corroborating vestibular stimulation at the start of optokinetic stimulation. Onset latencies were found to be significantly shortened with corroborating vestibular stimulation, but to be unaffected by noncorroborating vestibular stimulation. In Experiment 2, testing was done on a group of patients with unilateral (right labyrinth) Ménière’s disease, which produces decreased vestibular sensitivity to rightward body rotation and increased vestibular sensitivity to leftward body rotation. Visual-vestibular conflict during subjective rotation to the right should therefore be decreased, while during leftward subjective rotation it should be increased. The prediction that the latency to steady-state subjective rotation should be shorter than normal with subjective rotation to the left was supported.     

High risk drinking and college students' self-perceptions

The present study examined the relationship between high risk drinking and college students' self-perceptions. High risk drinking was defined as the consumption of four or more drinks in a row for women and five or more drinks in a row for men during a single sitting (within the last year). Historical trends regarding college-age drinking indicate that 44% of college students fit the criteria for high risk drinking at least once over the past year. A survey was administered to 210 college students (52 men and 158 women) between 18 and 22 years of age (M = 20.9, SD = 1.3) to assess their use of alcohol and their self-perceptions. Students' self-perceptions were measured with four subscales from the Neemann-Harter Self-perception Profile for College Students. Students either volunteered to participate in this study outside of class or were solicited during class. It was predicted that students' self-perceptions would differ significantly depending upon their alcohol consumption, i.e., 17.1% were Abstainers, 25.2% were Nonproblem Drinkers, and 57.6% were High Risk Drinkers. Analysis gave significant difference on Global Self-worth between students who abstained and those who were High Risk Drinkers. However, students' perceptions of Scholastic Competence, Intellectual Ability, and Social Acceptance did not differ significantly for the alcohol consumption groups. In addition to high risk drinking, a number of other variables were associated with self-perceptions, such as high school alcohol use, low high school GPA, and students' reported academic involvement. These relations are discussed.     

The role of the anterior left hemisphere in real-time sentence comprehension: evidence from split intransitivity

We investigate Broca's sentence comprehension as an impairment on normal syntactic composition: the slow-syntax hypothesis (SSH). Experiment 1 examines comprehension of object-relative clauses (Wh-movement). Experiment 2 examines comprehension of sentences with unaccusative verbs (NP-movement), which like passives, base-generate their theme-argument in object position. Guided by the SSH, both experiments test the prediction that syntax-dependent effects such as "gap-filling" are observable but in a delayed fashion. Results show that whereas no priming was obtained at the point of the trace, antecedent reactivation emerged 650 and 800 ms after the verb (for Wh- and NP-movement respectively). This shows, contrary to dependency-based generalizations, that Broca's patients are able to successfully implement dependencies, albeit in a protracted manner. Given the localization value provided by Broca's aphasia, this supports the notion that the temporal implementation of syntactic structure formation (i.e., the requirement that it be fast and automatic) depends on the integrity of the anterior left hemisphere.     

Think, blink or sleep on it? The impact of modes of thought on complex decision making

This paper examines controversial claims about the merit of "unconscious thought" for making complex decisions. In four experiments, participants were presented with complex decisions and were asked to choose the best option immediately, after a period of conscious deliberation, or after a period of distraction (said to encourage "unconscious thought processes"). In all experiments the majority of participants chose the option predicted by their own subjective attribute weighting scores, regardless of the mode of thought employed. There was little evidence for the superiority of choices made "unconsciously", but some evidence that conscious deliberation can lead to better choices. The final experiment suggested that the task is best conceptualized as one involving "online judgement" rather than one in which decisions are made after periods of deliberation or distraction. The results suggest that we should be cautious in accepting the advice to "stop thinking" about complex decisions.     

Elderly offenders in a maximum security mental hospital

Elderly offenders aged 60 and above constitute less than 8% of the population in a maximum security mental hospital. These offenders fall into 2 groups: 1) first admission at or after the age of 50 and 2) first admission before 50. Fewer first time offenders committed homicide in the first group than those in the second group. Neuropsychiatric disturbance and sex offending was common among male first time offenders in the first group; in contrast, schizophrenia and violent offending against persons was found more often in the second group. It is argued that elderly first time offenders should be given adequate neuropsychiatric assessment. © 1995 Wiley-Liss, Inc.     

The rubber hand illusion in a mirror

In the rubber hand illusion (RHI) one’s hand is hidden, and a fake hand is visible. We explored the situation in which visual information was available indirectly in a mirror. In the mirror condition, compared to the standard condition (fake hand visible directly), we found no reduction of the RHI following synchronised stimulation, as measured by crossmanual pointing and by a questionnaire. We replicated the finding with a smaller mirror that prevented visibility of the face. The RHI was eliminated when a wooden block replaced the fake hand, or when the hand belonged to another person or mannequin. We conclude that awareness of the reflection is the critical variable, despite the distant visual localisation of the hand in a mirror and the third-person perspective. Stimuli seen in a mirror activate the same response as stimuli seen in peripersonal space, through knowledge that they are near one’s body.     

The construct and criterion validity of emotional intelligence and its potential utility for management studies

In this study, the authors reviewed the definition of emotional intelligence (EI) and argued that El is conceptually distinct from personality. In Study 1, the authors showed that EI was related to yet distinct from personality dimensions and that it had incremental predictive power on life satisfaction. The authors examined the construct validity of self-reports and others' ratings of EI using two samples in Study 2. In a student sample, parents' ratings explained additional variance in the students' life satisfaction and feelings of powerlessness after controlling for the Big Five personality dimensions. In the work sample, peer ratings were found to be significant predictors of job performance ratings provided by supervisors after controlling for the Big Five personality dimensions. Other implications for future research on EI are discussed.     

Neural circuitry underlying perception of duration depends on language experience

Thai, a language which exhibits a phonemic opposition in vowel length, allows us to compare temporal patterns in linguistic and nonlinguistic contexts. Functional MRI data were collected from Thai and English subjects in a speeded-response, selective attention paradigm as they performed same/different judgments of vowel duration and consonants (Thai speech) and hum duration (nonspeech). Activation occurred predominantly in left inferior prefrontal cortex in both speech tasks for the Thai group, but only in the consonant task for the English group. The Thai group exhibited activation in the left mid superior temporal gyrus in both speech tasks; the English group in the posterior superior temporal gyrus bilaterally. In the hum duration task, peak activation was observed bilaterally in prefrontal cortex for both groups. These crosslinguistic data demonstrate that encoding of complex auditory signals is influenced by their functional role in a particular language.