Analyses of mental contamination: Part I,experimental manipulations of morality

The fear of contamination is thought to be comprised of two separate but related fears: those pertaining to physical and mental contamination. Previous research on mental contamination involved studies in which more than one independent variable was manipulated simultaneously. In particular, an immoral act (e.g., a non-consensual kiss) had been coupled with an immoral man (e.g., the person who forces the kiss) in each manipulation. The purpose of this study was to separate manipulations of the immorality of the man from the immorality of the act. Female undergraduate students (n = 148) listened to an audio recording and imagined that they were experiencing either sharing a consensual kiss with a man described as moral or immoral, or receiving a forced, non-consensual kiss from a man described as moral or immoral. Participants indicated the presence and degree of mental contamination and then completed a behavioural task for which spontaneous washing was recorded. Results indicated that a non-consensual kiss evoked greater feelings of mental contamination than a consensual kiss. In particular, participants who imagined a non-consensual kiss from a man described as either moral or immoral reported the greatest feelings of mental contamination, whereas participants who imagined a consensual kiss from a man described as moral reported the least. Results are discussed in terms of cognitive–behavioural conceptualizations of and treatments for contamination fears.     

Separating hoarding from OCD

There is confusion about the status of excessive hoarding. In particular, there is an unresolved question about whether or not it is a manifestation of obsessive-compulsive disorder (OCD). There are some definite similarities between ‘compulsive’ hoarding and OCD, but they are outweighed by the differences between them. It is proposed that the matter can be clarified by separating hoarding from OCD, and that this would advance clinical work and research.     

Relationship commitment and its implications for unprotected sex among impoverished women living in shelters and low-income housing in Los Angeles County.

OBJECTIVE: To examine how relationship commitment among impoverished women is associated with their frequency of unprotected sex. DESIGN: Cross-sectional analyses were conducted on survey data from a probability sample of 445 women initially sampled from shelters and low-income housing in Los Angeles County. MAIN OUTCOME MEASURE: Frequency of unprotected sex in a typical month was derived as the product of 2 items: how often the woman had sex with her partner in a typical month and how often a male condom was used. RESULTS: For both sheltered and housed women, relationship commitment predicted more frequent engagement in unprotected sex with their partner, even after controlling for the type of relationship (primary vs. casual). However, this association could not be accounted for by perceived partner monogamy, ability to refuse unwanted sex, perceived HIV susceptibility, and condom use self-efficacy. Among housed women only, never asking the partner to use a condom partially accounted for more frequent engagement in unprotected sex among women with stronger relationship commitment. CONCLUSION: Results emphasize the importance of relationship commitment issues in HIV prevention interventions with impoverished women, and the need for a better understanding of relationship commitment and its influence on condom use in this population.     

Kinematic Analyses of Manual Asymmetries in Visual Aiming Movements

The right hand advantage has been thought to arise from the greater efficiency of the right hand/left hemisphere system in processing visual feedback information. This hypothesis was examined using kinematic analyses of aiming performance, focusing particularly on time after peak velocity which has been shown to be sensitive to visual feedback processing demands. Eight right-handed subjects pointed at two targets with their left and right hands with or without vision available and either as accurately or as fast as possible. Pointing errors and movement time were found to be smaller with the right hand. Analyses of the temporal componenets of movement time revealed that the hands differed only in time after peak velocity (in deceleration), with the right hand spending significantly less time. This advantage for the right hand, however, was apparent whether or not vision was available and only when accuracy was emphasized in performance. These findings suggest that the right hand system may be more efficient at processing feedback information whether this be visual or nonvisual (e.g., proprioceptive).     

The schematic representation of effector function underlying perceptual-motor skill

Conceptual and methodological problems related to Schmidt' (1975) motor schema theory are discussed. In particular, the motor schema is interpreted as representing the dynamics of the system being controlled, which may or may not be associated with a referent movement pattern. Furthermore, it is suggested that prior familiarity with a control system's dynamics is a critical but uncontrolled factor in tests of the theory, and largely accounts for their equivocal findings. These ideas are examined by two experiments in which subjects had to bimanually control the movement of a computer-displayed cursor along a track on a CRT screen. Different track orientations required different patterns of movement not entailing a single generalized motor program. Experiment 1 shows that variable track performance with a given control system, results in better transfer to novel tracks than does fixed practice. Experiment 2 demonstrates that altering the control system disrupts performance whether or not the required movements remain the same. These results indicate the need for a fundamental modification of schema theory, such that a schematic representation of effector-environment relations (effector function) is available independently of particular movement patterns used in its acquisition.