Effects of worry and somatic anxiety induction on thoughts, emotion and physiological activity

Thirty-six Ss received Velten (1968) emotion inductions designed to produce either worrisome, somatically anxious, or neutral states. A breathing-focus task assessed the frequency of negative thought intrusions before and after the emotion induction. Worry induction produced the greatest increase in negative intrusions, significantly greater than the neutral condition. Somatic anxiety induction produced some increase in intrusions, nonsignificantly between worry and neutral inductions. Both worry and somatic anxiety inductions generated significant increases in cardiovascular activity relative to the neutral condition, while no effect was observed on gastric myoelectric activity. Worry was characterized by emotions on the Multiple Affect Adjective Checklist that overlap with those of depression and somatic anxiety.     

Effects of age and sex on reciprocal tapping performance

Using a reciprocal tapping task (Fitts's task), the speed and accuracy of small-amplitude motor movements of the hand were measured for 62 men and 84 women, 20 to 89 yr. of age. Men and women in their 20s and 30s performed similarly, although men in their 20s displayed a tendency to trade accuracy in favor of speed. Movement time increased noticeably for both men and women beginning with the 40s decade and continued to increase through the 80s decade. Error rates were lower for women than men and were relatively uniform for both men and women across all age decades past 30 yr. Older subjects of both sexes appeared to sacrifice speed (slowed down) to maintain accuracy on the task. The slope of the linear regression relating movement time to task difficulty was steeper for men than for women and increased more for men than women with advancing age, indicating that older men slowed down relatively more than older women on more difficult tasks.     

The role of the hemispheres in closed loop movements

The purpose of these experiments was to determine if the two hemispheres play different roles in controlling closed loop movements. Subjects were asked to move to a narrow or wide target in the left or right hemispace. Reaction time (RT) was faster for the left arm of normals, only in the right hemispace, but there were no differences between arms in movement execution. Right but not left hemisphere stroke (CVA) patients showed longer RTs for the contralateral but not ipsilateral arm. The right CVA group's ipsilateral movement, especially to narrow targets was less accurate. The left CVA group's RT did not benefit from advanced information, but ipsilateral movement execution was normal. These results were discussed in terms of inter- as well as intrahemispheric control of programming and execution of closed loop movements.     

Adult reflection in a graduate-level online distance education course

This study examined adult learners’ ability to engage in critical reflection concerning their own learning in a graduate-level online instructional technology course. The online course was facilitated through asynchronous discussions, and the course topic was about the design and delivery of distance education. The data for this study consisted of four critical reflection papers about students’ perception of their learning. The Periodic Reflection Tool, based on activity systems analysis, was introduced to participants as a guide for engaging in in-depth reflection about their learning process and completing their course assignment. After course completion and during data analysis, we applied instrumental learning and communicative learning theories to evaluate how participants used the tool to reflect on their personal learning in the course. At the conclusion of an analysis of their reflection statements, it was found that purposeful reflections guided by the Periodic Reflection Tool could help guide adult learners to reflect on many aspects of their learning and we suggest that the tool could be used to examine adults’ transition from traditional to online settings.     

The Validity of Construction Workers' and Students' Perceptions of Each Other: A Research Note

Following the spring 1970 confrontations between undergraduate college students and construction workers in lower Manhattan, a study of attitudes of a sample of undergraduates and construction workers was conducted. One hunderd Columbia University undergraduates and 100 apprentice construction workers were asked to indicate their level of agreement with 10 statements which were intended to embody "basic American tenets". The respondents within each group were also asked to predict the attitude that a member of the other group would hold. A "liberal/conservative" dichotomy was developed for the instrument by having independent judges categorize each of the 10 items as representing a "liberal" or a "conservative" attitude.
The expectations that student responses would be more liberal than construction worker responses and that each group would perceive this difference were tested and supported. The expectation that students perceive construction workers to be even more conservative than the workers report themselves to be was also supported. But the construction workers did not demonstrate the expected exaggeration of the students' liberalism.     

A system for automatically analyzing and correcting real-time experiment control programs

A system is described that automatically analyzes the time constraints in a real-time experiment control program and automatically makes corrections to that program to provide any degree of temporal accuracy desired by the experimenter within the capabilities of the hardware. A generalized procedure is presented to allow similar systems to be developed for most common languages and hardware platforms.