Assaultive behavior resulting from marital conflict

Recent evidence shows that dangerous acts, especially serious ones, are highly likely to be directed against family members. This fact calls for interpersonal assessment of dangerous behavior. The present authors have undertaken preliminary study of fighting behavior (verbal and physical) between married couples. A semistructured interview procedure has been devised to establish the methods used by both partners in carrying on their disputes. The authors propose that there are three broad types of fighting patterns to be found:constant high—sustained level of balanced antagonism;unpredictable volatile—low level of overt antagonism with occasional difficult-to-predict highly violent episodes;steady escalation—increasing levels of violence over time. Data from one couple representing each pattern are presented to demonstrate different parts of the interview schedule.     

Effects of changing compatibility relationships on reaction time to the first stimulus in a double-stimulation task

This study investigated the effects of manipulating the response requirement to the second stimulus (S2) on reaction time (RT) to the first stimulus (S1) in a double-stimulation choice RT task. Forty subjects responded to the 100 msec presentation of a left or right light by pressing the key on the same or opposite side as the light. Treatment conditions included a single-stimulation control (no S2 presented), and two double-stimulation conditions each requiring two responses (R1 and R2) in close succession, in one of these latter conditions, the rule governing R2 was the same as that governing R1 while, in the other, the rule governing R2 changed. Results showed the typical double-stimulation effect; i.e., increased latency of R1 when it was followed by S2 - R2. More importantly, R1 latency was increased further when the rules governing R1 and R2 were different. Results are discussed in terms of divided preparation capacity as well as other theories of the psychological refractory period.     

Concurrent task interference in stutterers: dissociating hemispheric specialization and activation

Using all four combinations of hand and foot, adult stutterers and nonstutterers performed a unimanual sequential finger tapping task together with a stimulus-contingent foot responding task. The two groups were similar in that both demonstrated more dual-task interference when using the ipsilateral than contralateral limb pairs. Contrary to a prediction based on a hypothesis that attributes stuttering to neural interference due to an ungated or unregulated activity flow between the hemispheres, stutterers did not show more interference than nonstutterers when using the contralateral limb pairs. The groups did differ, however, in terms of finger tapping interference associated with right- versus left-foot concurrent task responding. Nonstutterers showed more interference when using the left than right foot. This was interpreted in terms of the attentional demands that the foot responding task placed on a system with an inherent left-hemisphere attentional bias. The lack of a reliable difference in stutterers with respect to interference by the two feet is consistent with indications from other research that stutterers have a relatively labile system of hemispheric attention or activation. The results of the study are placed into the context of a general model of the brain mechanisms associated with stuttering.     

Comparison of stimulus control and reinforcement control effects on imitative behavior

An attempt was made to evaluate reinforcement and stimulus control of imitative and non-imitative behavior. The imitative response required the subject to duplicate the experimenter's response by matching blocks that varied in color. The factor designed to evaluate stimulus control was fading, a procedure that systematically varies the differences between the imitative and non-imitative stimuli. The topography and duration of the non-imitative stimuli were faded in. The factors designed to evaluate reinforcement control were differential reinforcement of non-imitative behavior and time out from positive reinforcement. The results showed stimulus control of non-imitation to be more important than reinforcement control, and that reinforcing events were not sufficient to control non-imitation; while the arrangement of stimulus events was sufficient to control non-imitation. These results were related to studies providing evidence for the processes of discrimination and generalization.     

Physical Attractiveness,Dangerousness, and the Canadian Criminal Code1

The Canadian Criminal Code contains provisions for labelling certain convicted criminal offenders as Dangerous Offenders. Sentences of indefinite duration are usually imposed on these offenders in place of the fixed sentences that would normally be imposed. The present study examined one potential source of bias in the use of the Dangerous Offender provisions, the physical attractiveness of an offender. Two hundred and eighty-four adults were given information about a hypothetical offender, including a facial photograph and a conviction record. They responded to questions about the dangerousness of the offender, including questions drawn from the Dangerous Offender criteria. Subjects perceived physically unattractive sexual offenders as significantly more likely to fulfill the Dangerous Offender criteria than average-looking and attractive sexual offenders. In particular, unattractive sexual offenders were seen as significantly less likely to restrain their behavior in the future. In light of the fact that there is currently no evidence that physical attractiveness is a valid predictor of sexual offender recidivism, this finding provides grounds to question whether the Dangerous Offender provisions of the Canadian Criminal Code, as they now stand, can be administered impartially.