Generalization of error detection across motor tasks by men and women

One of the cornerstones of the human motor learning process is the ability to self-detect and self-correct movement errors. However, despite their importance, relatively little research has been done on these topics. One unanswered question is whether error detection is a general ability or one specific to the task to be learned. To investigate this issue, 66 college-age participants (49 women and 17 men) performed four motor learning tasks: an anticipation-timing task, a slow arm-positioning task, a rapid arm-movement task (400-msec. goal), and a tone-duration production task (400-msec. goal). 50 practice trials were provided on each task, 35 with knowledge of results (KR) and 15 without KR. Participants verbally estimated error on all trials before KR was given, except for the slow positioning task on which overall error in performance was the measure of error detection. Error detection was developed for each task but transfer of this ability only occurred when two tasks shared the same movement pattern. Men performed better on anticipation-timing than women, but men and women detected errors equally well on all tasks.     

Distinguishing intentions from desires: Contributions of the frontal and parietal lobes

The ability to represent desires and intentions as two distinct mental states was investigated in patients with parietal (N = 8) and frontal (N = 6) lesions and in age-matched controls (N = 7). A task was used where the satisfaction of the desire and the fulfilment of the intention did not co-vary and were manipulated in a 2 × 2 set. In two experiments we show that lesions to the frontal lobe may impair the ability to deal with desires when their outcome is not congruent with that of the intention, and that parietal damage – especially if it encompasses the left temporo-parietal junction – may cause severe difficulties in the processing of both desires and intentions. The implications of the results for the neuropsychological and the developmental literature are discussed.     

The role of internal inhibition and the frontal lobes in child development

The theory that children show a predominance of excitation over internal inhibition and that this is due to inadequate development of the frontal lobes is explored and extended. Experimental results show that children resemble leucotomised monkeys in their difficulty in overcoming an initial preference in discrimination tasks.     

Microinjections of leupeptin in the frontal cortex or dorsal hippocampus block spatial learning in the rat

Adult male Long-Evans hooded rats were given bilateral microinjections of 18 mM leupeptin or saline through cannulae implanted with tips aimed at the frontal cortex or CA1 or CA3 hippocampal cell fields. Five minutes following injections animals were allowed to complete an eight-arm radial maze. The acquisition criterion required that the animal make 7 correct choices of the first 8, and 8 correct choices of the first 10, for five consecutive sessions. Leupeptin slowed acquisition of the eight-arm radial maze task when injected into the CA1 and CA3 hippocampal fields or the frontal cortex, but did not influence spontaneous activity. These results suggest that earlier reports of the amnestic effect of leupeptin when administered into the lateral cerebral ventricle may have been due to effects within the cortex and hippocampus. The present experiment represents the first attempt to identify behaviorally those brain areas in which leupeptin acts to alter learning.     

The frontal lobes and theory of mind: developmental concepts from adult focal lesion research

The primary objective in this paper is to present a framework to understand the structure of consciousness. We argue that consciousness has been difficult to define because there are different kinds of consciousness, hierarchically organized, which need to be differentiated. Our framework is based on evidence from adult focal lesion research. The different types of consciousness are associated with distinct brain regions, with the higher levels of consciousness related to self-awareness and theory of mind (both facets of consciousness), with an emphasis on the role of the frontal lobes. The secondary objective is to use this structure to suggest hypotheses about the potential effect of frontal dysfunction at various developmental stages, and including both congenital and acquired brain injury.     

Block design as a measure of everyday spatial ability: a study of ecological validity

This study investigated the effectiveness of the WAIS-R Block Design subtest to predict everyday spatial ability for 65 university undergraduates (15 men, 50 women) who were administered Block Design, the Standardized Road Map Test of Direction Sense, and the Everyday Spatial Activities Test. In addition, the verbally loaded National Adult Reading Test was administered to assess whether the more visuospatial Block Design subtest was a better predictor of spatial ability. Moderate support was found. When age and sex were accounted for, Block Design accounted for 36% of the variance in performance (r = -.62) on the Road Map Test and 19% of the variance on the performance of the Everyday Spatial Activities Test (r = .42). In contrast, the scores on the National Adult Reading Test did not predict performance on the Road Map Test or Everyday Spatial Abilities Test. This suggests that, with appropriate caution, Block Design could be used as a measure of everyday spatial abilities.     

Functional cerebral distance and the effect of emotional music on spatial rotation scores in undergraduate women and men

The influence of listening to music on subsequent spatial rotation scores has a controversial history. The effect is unreliable, seeming to depend on several as yet unexplored factors. Using a large sample (167 women, 160 men; M age = 18.9 yr.), two related variables were investigated: participants' sex and the emotion conveyed by the music. Participants listened to 90 sec. of music that portrayed emotions of approach (happiness), or withdrawal (anger), or heard no music at all. They then performed a two-dimensional spatial rotation task. No significant difference was found in spatial rotation scores between groups exposed to music and those who were not. However, a significant interaction was found based on the sex of the participants and the emotion portrayed in the music they heard. Women's scores increased (relative to a no-music condition) only after hearing withdrawal-based music, while men's scores increased only after listening to the approach-based music. These changes were explained using the theory of functional cerebral distance.     

Emotional expressivity in men and women: Stereotypes and self-perceptions

Three studies were conducted to assess prevalent stereotypes regarding men's and women's emotional expressivity as well as self-perceptions of their emotional behaviour. Emotion profiles were employed to assess both modal emotional reactions and secondary emotional reactions to hypothetical events and personal experiences. In Study 1 we asked how men and women in general would react to a series of hypothetical emotional events. In Study 2 we asked how participants themselves expected to react to these same situations and in Study 3 we asked participants to report a personal emotional event in narrative form. Two gender differences emerged across all three studies. Specifically, women were expected to be more likely to react with sadness to negative emotion-eliciting events in general. They also expected themselves to be more likely to react with sadness as well as to cry and to withdraw more when experiencing negative emotional events. Finally, women report more sadness when describing personal events. In contrast, men were expected to react with more happiness/serenity during negative emotional situations. Also, they expect themselves to react more frequently this way as well as to laugh and smile more and to be more relaxed in negative situations. Finally, men tend to report more happiness when describing negative personal events. In sum, the present study gives a more detailed portrayal of how men and women are expected and expect themselves to react to specific emotional situations and presents some evidence that these expectations may influence the way they reconstruct emotional events from their past.     

Sexual orientation and handedness in men and women: a meta-analysis

Recent findings suggest that sexual orientation has an early neurodevelopmental basis. Handedness, a behavioral marker of early neurodevelopment, has been associated with sexual orientation in some studies but not in others. The authors conducted a meta-analysis of 20 studies that compared the rates of non-right-handedness in 6,987 homosexual (6,182 men and 805 women) and 16,423 heterosexual (14,808 men and 1,615 women) participants. Homosexual participants had 39% greater odds of being non-right-handed. The corresponding values for homosexual men (20 contrasts) and women (9 contrasts) were 34% and 91%, respectively. The results support the notion that sexual orientation in some men and women has an early neurodevelopmental basis, but the factors responsible for the handedness-sexual orientation association require elucidation. The authors discuss 3 possibilities: cerebral laterality and prenatal exposure to sex hormones, maternal immunological reactions to the fetus, and developmental instability.     

Gender-related traits in gay men, lesbian women, and heterosexual men and women: the virtual identify of homosexual-heterosexual diagnosticity and gender diagnosticity

Three studies investigated the relationship between gender-related traits and sexual orientation. Study 1 showed that gay men and lesbians in an unselected sample of 721 college students differed from same-sex heterosexuals most strongly on gender diagnosticity (GD) measures, which assess male- versus female-typicality of interests (effect sizes of 2.70 for men and .96 for women) and least strongly on measures of instrumentality (I) and expressiveness (E). In Study 2, GD measures showed large differences between 95 gay and 136 heterosexual men (effect sizes of 1.61 and 1.83) and between 46 lesbian and 225 heterosexual women (effect sizes of .98 and 1.28), whereas I and E showed much smaller differences. In Study 3, GD showed large differences between 90 gay and 81 heterosexual men (effect sizes of 1.76 and 1.97) and between 82 lesbians and 108 heterosexual women (effect sizes 1.67 and 1.70). whereas I and E showed much smaller differences. Using data from Studies 2 and 3, "gay-heterosexual diagnosticity" measures were computed for men and "lesbian-heterosexual diagnosticity" measures for women, based on occupational and hobby preferences. These measures correlated very strongly with GD measures.     

Out of focus: Images of women and men in newspaper photographs

This study examined the roles portrayed by men and women in newspaper photographs. The photographs in the 184 issues of the four Connecticut newspapers studied yielded 8960 representations of men and women. Photographs were coded for page placement and the roles portrayed by each individual. The author found that on most pages and in most roles, photos of men far outnumber those of women. While there is some indication that the range of roles portrayed is less limited for both women and men, it is also clear that the roles in which women and men are portrayed are clustered stereotypically: professional and sports for men and spouse for women. Suggestions for methodological refinements that might help clarify the extent and nature of stereotyping also are presented.Data for this study was gathered while the author was a Humanities Center Fellow at the University of Hartford.     

Father-absent women: Self-concept and modes of relating to men

Four groups of college-age women were used to determine the relationship between absence of father in childhood and adult self-concept and interpersonal relationships with men. Groups consisted of 15 father-present subjects who came from intact homes; 15 father-absent (FA) subjects with no older brothers who experienced the death of their father early in life; 15 FA subjects with no older brothers who experienced father loss due to divorce; and 12 FA subjects with one or more older brothers whose parents were divorced. The Tennessee Self-Concept Scale and a self-report questionnaire of modes of relating to men were the dependent variable measures. Results revealed no significant differences among groups in most areas of self-concept or interpersonal relationships with both older and age-peer men. Only in social self-concept and nurturance behavior with age-peer men were significant differences observed. Thus, only partial support of the hypotheses of differences was obtained. Reasons for the departure between earlier and present results are proposed.This article is based on a master's of arts thesis completed by the first author (now at the University of Utah) under the direction of the second author.     

Fibromyalgia in men and women: comparison of the main clinical symptoms

The prevalence of fibromyalgia (FM) in males is much lower than in women. Thus, current knowledge about the syndrome has been developed from research with women. The aim of the present study is to analyze whether FM manifestations differ as a function of sex. Two clinical groups with FM (21 males and 21 women) and a control group of healthy men (n= 21) participated in the study. Several aspects of pain, sleep, fatigue, psychopathology, emotional distress and functional impact of FM were evaluated with an algometer and questionnaires. The clinical groups showed a significantly greater impairment than the control group in all the self-report measures. However, the FM patients only showed significant differences in the sensibility threshold to the pain, which was lower in the women. In addition, the best predictor of the experience of pain in males was sleep quality, and in the women, catastrofying pain. Our results suggest that the most effective therapeutic strategies to control pain may be different for men and women.     

Friendships of older men and women: exchange patterns and satisfaction

In this study we examined the relation between perceived equity of exchanges and friendship satisfaction for a sample of 110 older men and women. Respondents were interviewed concerning their relationship with their best friend and one other friend in their support network. Perceived equity was a significant predictor of friendship satisfaction only in the case of the other friend. In addition, results showed that men were involved in more equitable friendships than were women. Discussion focuses on the importance of equity consideration and gender differences in the friendships of older adults.     

What women think and what men think women think: perceptions of abuse and kindness in dating relationships

The purpose of this study was to investigate how college women and their boyfriends viewed their relationships in terms of both abuse and kindness. The women filled out the Psychology Abuse-Kindness Relationship Inventory for themselves and their boyfriends responded to the questionnaire as they thought their girlfriends would. Several intriguing findings resulted: (1) Men thought their girlfriends would respond more negatively about the relationship than the women actually did. (2) Certain aspects of the relationship resulted in more discrepancies between the men's and women's perceptions. (3) Women distinguished present from past relationships by describing the former as more positive and the latter as more negative; men made no such distinction. Alternative explanations were offered to account for these results including projection, denial, projective identification, lack of psychological separation within couples, men's emotional upbringing and deeply rooted feelings towards women.     

Why men (and women) do and don't rebel: effects of system justification on willingness to protest

Three studies examined the hypothesis that system justification is negatively associated with collective protest against ingroup disadvantage. Effects of uncertainty salience, ingroup identification, and disruptive versus nondisruptive protest were also investigated. In Study 1, college students who were exposed to an uncertainty salience manipulation and who scored higher on system justification were less likely to protest against the governmental bailout of Wall Street. In Study 2, May Day protesters in Greece who were primed with a system-justifying stereotype exhibited less group-based anger and willingness to protest. In Study 3, members of a British teachers union who were primed with a "system-rejecting" mind-set exhibited decreased system justification and increased willingness to protest. The effect of system justification on nondisruptive protest was mediated by group-based anger. Across very different contexts, measures, and methods, the results reveal that, even among political activists, system justification plays a significant role in undermining willingness to protest.     

Some men like it black,some women like it pink: consumer implications of differences in male and female website design

• The World Wide Web doubles in size roughly every 2–3 months and dramatic claims are made about the effectiveness of Web‐based commercial efforts. The centrality of non‐price mechanisms of differentiation to the perception, enjoyment and ease of use felt using websites is acknowledged but the only statistically rigorous studies of factors such as form and content have been conducted within a universalist paradigm of aesthetics. This paper reports on an interactionist approach to web aesthetics involving an analysis of 60 male‐ and female‐produced websites. The analysis reveals statistically significant differences between the male‐ and female‐produced websites on 13 out of the 23 factors analysed. These differences span issues of navigation as well as linguistic and visual content. The paper argues that the appeal of websites can be maximised if they mirror the needs and interests of their target populations and that websites targeted at male or female dominated markets need to reflect the aesthetic diversity found in the male‐ and female‐produced websites analysed here. It also presents information on the demographics of the IT profession, showing that there is a potential imbalance between the percentage of women involved online and those involved in the IT profession. This suggests that the male domination of the IT profession could be a barrier to the effective mirroring of female Website preferences.

Copyright © 2006 John Wiley & Sons, Ltd.