Controlling the Ground Reaction Force During Lifting

The control of the ground reaction force vector relative to the center of gravity (CoG) was examined while subjects performed a back-lifting task. Six male subjects (aged 24.0 +/- 2.5 years) repeatedly lifted a barbell. A biomechanical analysis that used a linked segment model revealed that the summed rotations of body segments during lifting yielded a specific rate of change of the angular momentum of the entire body. This equaled the external moment provided by Fsubg; relative to CoG. This implies that multisegment movements involve control of the angular momentum of the entire body through an appropriately directed Fsubg;. Thus, in dynamic tasks Fsubg; is pointed away from rather than lined up with the CoG, as is the case in static tasks.     

Testing Two Theoretical Explanations for the Attraction-Enhancing Effects of Self-Disclosure

The study investigated the differential ability of similarity theory and social exchange theory to predict the effects of self-disclosure in a counseling versus a friendship encounter The participants were 80 undergraduates. A 2 (counseling or friendship) × 2 (positive or negative disclosure) × 2 (relevant or irrelevant disclosure) design was used in which participants rated the videotaped self-disclosure of an individual in an initial dyadic encounter. Unequivocal support was not obtained for either of the theories, but relationship context (counselor vs. peer) influenced the effects of disclosure as measured on counselor-peer and relationship characteristics. A unique feature of the study was the use of the Client Reactions System (CRS) to measure participants' immediate reactions to self-disclosure. The CRS demonstrated both relationship context and valence of disclosure (positive or negative) effects.     

Graphics in written directions: Appreciated by readers but not writers

This series of studies investigated the ability of literate adults to exploit communications options that are available to writers but have no counterpart in speech. Specifically it examined people's use of sketches when giving written directions to help a stranger cross town. When writing an informal letter to a friend most directions were given in prose paragraph style (Experiment 1). Almost no-one included a sketch, even if given a street map as an aid. Yet most subjects could draw adequate sketch maps (Experiment 2), and everyone said yes when asked whether they would include a sketch in a letter. So the previous choices were not constrained either by graphic skill or by judgements concerning the appropriateness of a sketch, When people were asked to 'design' the back page of a leaflet they still did not include a sketch (Experiment 3). Experiment 4 showed that any bias in the instructions was towards rather than against the use of sketches. The need to generate the sketch was removed in Experiment 5 where subjects composed the leaflet page from pre-formed sections that included alternative routes in both words and diagrams. Nearly all subjects now included a sketch in their directions. In case subjects previously, in haste, had not considered the possibility of including a sketch map, they were made aware of the drawing option by rating the usability of route information in a variety of communication styles immediately before writing their own directions (Experiment 6). People rated directions that included diagrams as significantly more usable, but still most subjects did not include a sketch in the directions they gave. So the communication styles that readers recognized as successful were not determining their choices as writers. It is suggested that, when giving written directions, inexperienced writers rely too heavily on how they would respond as speakers.     

Counseling applications of RET in a Chinese cultural context

To explore the potential of Rational Emotive Therapy (RET) with clients of Chinese background, a brief review is conducted with respect to parallels between RET philosophy and some key components of Chinese culture and ways in which Chinese think. Arguments are advanced as to why RET is particularly suitable for use within a Chinese cultural context. Issues involved in using RET with Chinese clients are addressed including the appreciation many Chinese have for the logical and rational aspects of RET, the most appropriate type of client-counselor relationship to facilitate RET therapeutic progress, appropriate ways to dispute, and some cautionary words on the use of “emotive methods”. Areas where the RET counselor needs to be particularly sensitive to the cultural background of the client are highlighted. Charles P. Chen holds a master's degree in educational counseling and is currently a Ph.D. student and instructor in the Department of Counselling Psychology at the University of British Columbia in Vancouver, Canada. His interests include cross-cultural and multi-cultural counseling, career counseling, and group counseling.     

MOTHERS' ALCOHOL CONSUMPTION DURING PREGNANCY:

Abstract— Fourteen-year-old adolescents' behavior on a spatial-visual reasoning task was associated with self-report of their mothers' alcohol consumption during pregnancy, IS years earlier The task was arranged so that it was possible to evaluate the examinees' tendency to respond rapidly and less accurately, or slowly and more accurately The greater the mother's reported drinking, the faster and less accurately the adolescent responded The decrement in visual-spatial reasoning related to alcohol appears to be linked to a tendency toward impulsive responding