Influence of contextual features on the activation of ambiguous word meanings.

Three studies examined whether initial meaning activation is sensitive to context. Experiment 1 demonstrated that contextually appropriate targets were activated more than inappropriate targets. Experiment 2 evaluated activation across intervals of 0, 300, and 600 ms. Constraining sentences activated contextually appropriate meanings over inappropriate meanings. This was maintained across the intervals for highly salient targets. Less-salient targets, although initially activated, were no longer activated 300 ms following the homograph. Experiment 3 converged on context-sensitive activation following a 50-ms exposure of the sentence-final homograph. Conclusions are (a) initial meaning activation can be sensitive to context, (b) when a homograph is instantiated, it is congruent with a broad scope of targets, and (c) less-salient targets receive less activation over the time course.     

Helping as a function of feeling state and nature of the helping behavior

The proposition that positive feelings increase helping because they increase the perception of personal power implies that if the person prefers not to help, positive feelings would decrease helping. This was tested in an experiment that varied feelings and pleasantness of the helping task. False meter feedback was used to manipulate feelings, and an indirect check on the manipulation showed that it was effective in varying feelings. As expected from the notion that positive feelings allow the person to feel free to refuse to help, there was an interaction between feelings and pleasantness of the helping task; positive feelings produced less helping than neutral or negative feelings when the helping task was unpleasant.This research was supported by a grant from the National Science Foundation.     

Providing help and desired relationship type as determinants of changes in moods and self-evaluations

Observed in 2 initial studies was converging evidence that helping improves the helpers' moods and self-evaluations. In these studies Ss induced to help showed improved moods and self-evaluations relative to Ss not given an opportunity to help. A 3rd study examined the moderating effects of desired relationship type on reactions to having helped. In this study Ss were led to desire either a communal or an exchange relationship with another. They then helped the other or were not allowed to help. Among Ss led to desire a communal relationship, but not among those led to desire an exchange relationship, helping was associated with greater improvements in moods than not helping. Helping tended to improve self-evaluations regardless of desired relationship type. However, this effect reached statistical significance only among subjects led to desire a communal relationship.