Sentence comprehension by Broca's aphasics: Effects of some suprasegmental variables

Three subtests of comprehension (one of varying sentential stress, one of shifting juncture, and one of applying emphatic stress to functors) were administered to eight Broca's aphasics and eight controls to determine the effects of stress and juncture on disambiguation of these sentences. Data indicated that the aphasic group performed significantly worse than the normals on all three subtests of comprehension. In addition, there was a strong positive correlation between severity of aphasia and error scores for all three tests. Results are discussed in relation to intact-vs.-disordered comprehension.     

Matching, undermatching, and overmatching in studies of choice

Almost all of 103 sets of data from 23 different studies of choice conformed closely to the equation: log (B(1)/B(2)) = a log (r(1)/r(2)) + log b, where B(1) and B(2) are either numbers of responses or times spent at Alternatives 1 and 2, r(1) and r(2) are the rates of reinforcement obtained from Alternatives 1 and 2, and a and b are empirical constants. Although the matching relation requires the slope a to equal 1.0, the best-fitting values of a frequently deviated from this. For B(1) and B(2) measured as numbers of responses, a tended to fall short of 1.0 (undermatching). For B(1) and B(2) measured as times, a fell to both sides of 1.0, with the largest mode at about 1.0. Those experiments that produced values of a for both responses and time revealed only a rough correspondence between the two values; a was often noticeably larger for time. Statistical techniques for assessing significance of a deviation of a from 1.0 suggested that values of a between .90 and 1.11 can be considered good approximations to matching. Of the two experimenters who contributed the most data, one generally found undermatching, while the other generally found matching. The difference in results probably arises from differences in procedure. The procedural variations that lead to undermatching appear to be those that produce (a) asymmetrical pausing that favors the poorer alternative; (b) systematic temporal variation in preference that favors the poorer alternative; and (c) patterns of responding that involve changing over between alternatives or brief bouts at the alternatives.     

Feedback functions for variable-interval reinforcement

On a given variable-interval schedule, the average obtained rate of reinforcement depends on the average rate of responding. An expression for this feedback effect is derived from the assumptions that free-operant responding occurs in bursts with a constant tempo, alternating with periods of engagement in other activities; that the durations of bursts and other activities are exponentially distributed; and that the rates of initiating and terminating bursts are inversely related. The expression provides a satisfactory account of the data of three experiments.     

Madness and Prophecy: Dreams,Texts, and the Power of Rabbinic Interpretation

To the rabbis, dreams were a serious theological challenge. While in the Hebrew Bible dreams could be prophetic and therefore a source of authority, rabbinic authority was based on textual interpretation rather than direct revelation. This article examines one rabbinic strategy for responding to this challenge: the Talmudic dream ritual of Berakhot 55b. Through this ritual the rabbis place the dreamer in the position of a supplicant. Dreaming becomes like an illness or curse rather than a revelation. Instead of telling the dream, the dreamer prays for its healing. This article argues that this ritual itself is a form of interpretation, both of the dreamer’s dream and of the biblical texts about dreaming, in which the biblical idea of revelation through dreams is retained but the dream itself is stripped of any specific prophetic meaning. Through the performative speech of this ritual the dreamer places the dangerous dream under the power of rabbinic authority.

Changes in Sexual Functioning and Mood Among Women Treated for Gynecological Cancer Who Receive Group Therapy: A Pilot Study

This study examined changes in sexual functioning and mood disturbance among women who have been treated for gynecological cancer and who participated in a 12-week group intervention for psychosexual problems. The Changes in Sexual Functioning Questionnaire (CSFQ) assessed the sexual functioning, and the Profile of Mood States (POMS) assessed the mood disturbance of 19 women at baseline who completed follow-ups conducted posttreatment and three-month posttreatment. The results showed that the women improved significantly in their CSFQ total scores after being provided with the group therapy intervention at the posttreatment assessment (p < .01), and a statistical trend (p < .10) suggested continued improvement in CSFQ total scores at the three months posttreatment follow-up. Women's POMS total mood disturbance scores improved significantly at the posttreatment assessment (p = .01), but did not show significant improvement at the 3-month posttreatment follow-up. These results suggest that this group intervention achieved its main goal in treating sexual dysfunction as well as mood disturbance, but these improvements dissipated over time and may require further intervention in order to be maintained.     

Dynamics of choice: a tutorial

Choice may be defined as the allocation of behavior among activities. Since all activities take up time, choice is conveniently thought of as the allocation of time among activities, even if activities like pecking are most easily measured by counting. Since dynamics refers to change through time, the dynamics of choice refers to change of allocation through time. In the dynamics of choice, as in other dynamical systems that include feedback, change is away from perturbation and toward a steady state. Steady state or equilibrium is assessed on a longer time scale than change because change is only visible on a smaller time scale. When we compare laws of equilibrium, such as the matching law with laws of dynamics, two possibilities emerge. Self-similarity occurs when the same law can be seen across smaller time scales, with the result that the law at longer time scales may be understood as the expression of its application at smaller time scales. Reduction occurs when the dynamics at a small time scale are incommensurate with the dynamics at longer time scales. Then the process at the longer time scale is reduced to a qualitatively different process at the smaller time scale, as when choice is reduced to switching patterns. When reduction occurs, the dynamics at the longer time scale may be derived from the process at the smaller time scale, but not the other way around. Research at different time scales is facilitated by the molar view of behavior.