Effects of frontalis tension level on discrimination task accuracy and reaction time

The frontalis muscle is a focal point of many relaxation training programmes, so the effects of varying frontalis tension levels on concurrent task performance need consideration when recommending in situ muscle relaxation. Two experiments are reported; performance on a discrimination task was examined across high, moderate, and low induced frontalis tension. When length of exposure to the task stimuli was unlimited, accuracy of discrimination was affected by tension; when exposure was limited, reaction time was affected. In both experiments the high frontalis tension resulted in better performance than the other levels. Implications for the practice of in situ relaxation are considered.     

Patterns of maternal and infant imitation during play

In contrast to recent experimental studies that have sought to establish the infant's ability to imitate, the goal of the current study was to establish the actual performance of imitation by infants and their mothers during episodes of face-to-face play. Three-min play episodes of 20 mothers and their 13- to 16-week-old infants were videotaped. Instances of mouth openings, lip movements, tongue protrusions, smiling, and vocalizations by both partners were coded. Sequential analyses revealed stochastic patterns of imitation by both interactants. Mothers contingently imitated initiations by their infants and were more likely to make like initiations during action in the same category by their infants. Infants did not show onset-to-onset imitation but did show an increased likelihood to initiate actions when their mothers were engaged in a like action. That imitation by the mother is a pervasive characteristic of such interactions is consistent with earlier suggestions of its role in the acquisition of social and emotional skills. The results suggest that infants also display patterns of matching in early social interactions.     

When a kiss is not just a kiss: Relating violations of consent in kissing to rape myth acceptance

This study examined the relationship rape attitudes have to violations of consent in kissing. We found that the association between rape myth acceptance and responses to violations of consent in kissing was significant regardless of whether these violations took place within the context of a first date, long-term dating, or marriage. We also found that male subjects had higher rape myth acceptance than females and were more supportive of a man's right to violate a woman's consent in kissing. Finally, the association between gender and responses to forced kissing was significant independent of the context in which the forced kiss occurred.     

Effects of material rewards on inkblot perception and organization

To explore further the potential relationship between material rewards and developmental regression, this research examined the effects of material rewards on perceptual organization as measured by Holtzman inkblot responses. Forty introductory psychology students (20 males and 20 females) were assigned to either a reward or nonreward group initially matched on sex and IQ. Reward subjects had lower scores on form definiteness, form appropriateness, integration, human, movement, color, and shading; faster response time; and higher scores on location and on pathognomic verbalization. Although reward/nonreward differences reached significance only for form definiteness, form appropriateness, shading, and response time, the differences on all 10 Holtzman Inkblot Technique variables that are sensitive to developmental change were in the predicted direction of a lower level of functioning under reward.     

Effect of "group spell" upon Shotokan black-belt performance of Heian kata

11 experienced black-belt subjects were individually timed on each of the five Heian kata and then timed again when performing as part of a group. The pull of the group had a significant effect upon timing on two of the kata.     

Socioemotional functioning of creative preschoolers

This study investigated the relationship between original thinking and socioemotional characteristics of 40 preschoolers, ranging in age from 44 to 68 mo. (M = 56.2 mo.). Socioemotional behavior was assessed by teachers on two ratings, the Kohn Social Competency and the Child's Behavior Traits scales. Creative potential was assessed by the Multidimensional Stimulus Fluency Measure which measures ideational fluency. Contrary to expectations, no statistically significant differences in psychosocial adjustment were found between the more and less creative preschoolers on a median split. A significant effect for sex was detected on six of seven socioemotional variables examined, with girls scoring higher than boys on over-all adjustment. Similarly, more positive attributes of preschool girls are indicated in areas of functioning that traditionally have been reported to be characteristic of boys.     

关于负启动机制的研究

本世纪８０年代中期以来,关于负启动的研究现已成为注意研究的一个热点,并积累了丰富的实验成果,提出了许多新的研究课题。本文是在此基础上,对负启动现象作一个简单的介绍,概述了有关负启动产生机制的各种假说,并探讨了负启动机制的未来研究方向。     

Maternal unresolved attachment status impedes the effectiveness of interventions with adolescent mothers

Children of adolescent mothers are at risk for a variety of developmental difficulties. In the present study, the effectiveness of a brief intervention program designed to support adolescent mothers' sensitivity to their infants' attachment signals was evaluated. Participants were adolescent mothers and their infants who were observed at 6, 12, and 24 months of age. The intervention conducted by clinically trained home visitors consisted of eight home visits between 6 and 12 months in which mothers were provided feedback during the replay of videotaped play interactions. At 12 months, 57% of the mother–infant dyads in the intervention group and 38% of the comparison group dyads were classified as secure in the Strange Situation. Seventy‐six percent of the mothers in the intervention group maintained sensitivity from 6 to 24 months compared with 54% of the comparison mothers. Further analyses indicated that the intervention was effective primarily for mothers who were not classified as Unresolved on the Adult Attachment Interview.