On the degree of attention and capacity limitation in tactile processing

Two conditions were used to evaluate Os’ ability to detect near-threshold vibrotactile stimuli. In both conditions, a signal was presented at one of three skin loci, the O stating which locus received the stimulus. In the simultaneous condition, there was a single observation interval during which a signal occurred at one of the three loci. In the sequential condition, there were three observation intervals presented successively at 800-msec intervals, with a signal presented at one of the three loci during one of the three observation intervals. Each observation interval was associated with a particular locus. Theories postulating attentional control and limitations of capacity during this type of vibrotactile information processing predict performance to be inferior in the simultaneous condition, since that condition requires sharing of attention among the three possible sources of tactile stimulation. The data showed performance to be identical in the two conditions. This result not only disconfirms the single-channel model proposed by Franzen, Markowitz, and Swets (1970), but also argues for an unlimited-capacity nonattention model of tactile perceptual processing. The results are in accord with similar findings for visual processing by Shiffrin and Gardner (1972).     

The effect of monetary reward and punishment on the repetition of responses under open and closed task conditions

Subjects were given one study and two test trials on a list of paired associates. Critical responses on the first test were those which were rewarded or punished by gain or withdrawal of money. Between subjects variables were (a) whether the critical responses on test 1 were right or wrong, and (b) whether subjects were informed of the second test before or after test 1. On test 2, subjects were asked to repeat their test 1 responses to the appropriate stimuli. When subjects were unaware that they would receive a second test, rewarding a response on test 1 increased its probability of repetition on test 2; punishment had no significant effect. When subjects were aware that they would be tested again, the reward/ punishment treatment had no effect. An explanation based on the Law of Effect is rejected in favour of a cognitive explanation, utilizing the total time hypothesis.     

"I am us": negative stereotypes as collective threats

Collective threat is the fear that an in-group member's behavior might reinforce a negative stereotype of one's group. In a field study, self-reported collective threat was higher in stereotyped minorities than in Whites and was linked to lower self-esteem in both groups. In 3 experimental studies, a potentially poor performance by an in-group member on a stereotype-relevant task proved threatening, as evidenced by lower self-esteem among minority students in 2 experiments and women in a 3rd experiment. The latter study demonstrated the generality of collective threat. Collective threat also undermined academic performance and affected self-stereotyping, stereotype activation, and physical distancing from the in-group member. Results further suggest that group identification plays a role in whether people use an avoidance or challenge strategy in coping with collective threat. Implications for theories of social identity and stigmatization are discussed.     

Investigator ratings of ADHD symptoms during a randomized, placebo-controlled trial of atomoxetine: a comparison of parents and teachers as informants

This study compared investigator ratings of ADHD symptoms based on interviews with parents and teachers during a doubleblind, placebo-controlled study of atomoxetine. Investigators completed the ADHD Rating Scale: Investigator (ADHDRS-I) based on separate semistructured interviews with the primary caretaker and teacher of the participant. Interviews were conducted at Visits 2 to 7 during a double-blind treatment protocol comparing atomoxetine (N= 10) and placebo (N= 6). Both parent and teacher-based ratings were sensitive to change in ADHD symptoms with atomoxetine treatment. Parent-based assessment differentiated significantly between treatment with atomoxetine and placebo, whereas teacher-based assessment was less sensitive to change. Parents and teachers showed good agreement on change in ADHDRS-I scores. Investigator ratings based on parent- and teacher-report were sensitive to change in symptoms of ADHD during treatment with atomoxetine. Despite good agreement between parent- and teacher-based ratings of symptom change, parent-based ADHD symptom ratings are more sensitive to symptom change.     

Habermas on reason and revolution

Identifying self-empowerment as the normative core of the liberal democratic project, Habermas proceeds to dilute the revolutionary character of that project. After describing Habermas' views about legitimation problems in the West, the author examines critically Habermas' claim that democratic practices of self-empowerment must be self-limiting, arguing that under some circumstances (which cannot be specified in advance), more radical forms of self-empowerment may be justified. The author also argues that Habermas' own acknowledgement of the revolutionary character of liberal democracy, along with his criticisms of the manifestly unconstitutional circulation of power which characterizes existing liberal democratic states, may themselves provide the basis for a more radical conception of self-empowerment than Habermas will currently allow.     

Death and Dying in the Contemporary United States: What are the Psychological Implications of Anticipated Death?

Over the last 200 years, where, when and how Americans die has changed dramatically. Throughout the 19th and early 20th centuries, most deaths occurred with little warning, typically due to short‐term infectious diseases. In the contemporary United States, death typically happens to older adults following a long‐term chronic illness. Most older adults die in institutions rather than at home, and many rely on life‐extending medical technologies. For most older Americans, it is more useful and accurate to conceptualize the end of life as an anticipated and protracted process (i.e., dying) rather than a discrete and sudden event (i.e., death). In this article, I summarize historical and epidemiologic patterns of death and dying, and describe the implications of these patterns for two psychological processes: preparations for one’s own end of life; and psychological adjustment to the death of a loved one.     

Use of gesture sequences in captive chimpanzee (Pan troglodytes) play

This study examined the use of sensory modalities relative to a partner’s behavior in gesture sequences during captive chimpanzee play at the Chimpanzee and Human Communication Institute. We hypothesized that chimpanzees would use visual gestures toward attentive recipients and auditory/tactile gestures toward inattentive recipients. We also hypothesized that gesture sequences would be more prevalent toward unresponsive rather than responsive recipients. The chimpanzees used significantly more auditory/tactile rather than visual gestures first in sequences with both attentive and inattentive recipients. They rarely used visual gestures toward inattentive recipients. Auditory/tactile gestures were effective with and used with both attentive and inattentive recipients. Recipients responded significantly more to single gestures than to first gestures in sequences. Sequences often indicated that recipients did not respond to initial gestures, whereas effective single gestures made more gestures unnecessary. The chimpanzees thus gestured appropriately relative to a recipient’s behavior and modified their interactions according to contextual social cues.     

The challenge of merging: merger patterns, premerger status, and merger support

Employees of merging organizations often show resistance to the merger. The employees' support depends on the companies' premerger status and on the merger pattern. Based on an intergroup perspective, three studies were conducted to investigate the influence of premerger status (high, low) and merger pattern (assimilation, integration-equality, integration-proportionality, transformation) on participants' support for a pending organizational merger. Students (Study 1) and employees (Study 2) had to take the perspective of employees of a fictitious merging organization. Study 3 investigated students' perceptions of a potentially pending university merger using a 2 (status) x 3 (merger pattern: assimilation, integration-equality, integration-proportionality) design. Across all studies, the low-status group favored integration-equality and transformation whereas the high-status group preferred integration-proportionality and assimilation. Perceived threat mediated the effects. Legitimacy was a stronger mediator for effects of the low-status group.