Structure and Continuity of Well-Being in Mid-Adulthood: A Longitudinal Study

The present study analyzed whether the tripartite model of well-being (Keyes in J Health Soc Res 43:207–222, 2002; Journal of Consulting and Clinical Psychology 73:539–548, 2005a) and low depression can be captured by a core factor. Furthermore, it examined whether well-being shows continuity from early middle adulthood to middle adulthood. The study was based on the Finnish Jyväskylä Longitudinal Study of Personality and Social Development (Pulkkinen 2006), where the same participants (initial N = 369; 53% males) have been followed from age 8 until middle age. Data gathered at ages 36 and 42 were used. Well-being was indicated by (a) emotional well-being (including positive mood and low negative mood, satisfaction with different life-domains, and happiness); (b) Scales of Psychological Well-Being (Ryff in J Pers Soc Psychol 57:1069–1081, 1989); (c) Scales of Social Well-Being (Keyes in Soc Psychol Q 61:121–140, 1998); and (d) low level of depression. These measures were administered at both ages (except for social well-being, which was available only at age 42). The results, based on structural equation modeling, showed that a latent factor consisting of the above dimensions of well-being fit the data and that the structure of well-being was the same across genders and time. Well-being showed a high continuity from age 36 to 42 (standardized coefficient 0.84). As a conclusion, the different dimensions of well-being had only little variance of their own and a core factor of well-being was empirically established.     

Perceiving minority members as individuals: the effects of relative group size in social categorization

According to the account by comparative distinctiveness, minorities draw attention by virtue of their relative size, leading to more individuation and more stereotyping of their members. Using the ‘Who said what?’ paradigm by Taylor, Fiske, Etcoff, and Ruderman ( 1978 ) in Klauer and Wegener's ( 1998 ) modified version, relative group size of gender categories and age categories was varied in a pilot study and a main experiment, respectively. In the pilot study, memory for discussion statements and in both studies, memory for individuating information increased as subgroup size decreased. Rating measures obtained in the main experiment revealed most stereotyping of minority members. The findings thereby support major predictions of the account by comparative distinctiveness, but demonstrate dissociations between different modes of category‐based processing, i.e. category memory, reconstructive category use, and stereotyping. Copyright © 2002 John Wiley & Sons, Ltd.     

The effect of changes in posture and clothing on the development of unfamiliar person recognition

In contrast to face recognition little is known about the development of unfamiliar whole‐person recognition. Various cues in a person's appearance may contribute to recognition performance. An age‐related influence of different features on person recognition performance is possible. Here, we investigated two variable features of person recognition, namely posture and clothing, in 4‐year‐olds, 6‐year‐olds, 8‐year‐olds, 10‐year‐olds and adults. The experimental methodology of a short‐term recognition‐test with an immediate four alternative forced choice (4AFC)‐array was used. Targets were shown for 5 seconds. Experiment 1 clearly indicates that a variation of both posture and clothing decreases performance in all age groups compared to a standard, i.e. a no‐change condition. An interaction age×variation of posture and clothing was not observed. In order to untangle the two aspects of posture and clothing, Experiment 2 varied only posture between encoding and recognition. An age‐effect was shown, but no other significant result occurred. Experiment 3 investigated variation of clothing only, and found main effects of clothing and age. Because there was no interaction between the two factors we infer that a change of clothing impairs all subjects' recognition performance. Children's person recognition performance suffers in a way similar to adults' person recognition performance when clothing is varied. In contrast, changing posture does not necessarily decrease recognition accuracy, neither in children nor in adults. No developmental gains were found for dealing with the transformation of posture and clothing between the encoding and recognition phase. Copyright © 2003 John Wiley & Sons, Ltd.     

Abstract noun classification: using a neural network to match word context and word meaning

Psychologists have used artificial neural networks for a few decades to simulate perception, language acquisition, and other cognitive processes. This paper discusses the use of artificial neural networks in research on semantics—in particular, in the investigation of abstract noun meanings. It is widely acknowledged that a word’s meaning varies with its contexts of use, but it is a complex task to identify which context elements are relevant to a word’s meaning. The present study illustrates how connectionist networks can be used to examine this problem. A simple feedforward network learned to distinguish among six abstract nouns, on the basis of characteristics of their contexts, in a corpus of randomly selected naturalistic sentences.     

A study of a bimanual synergy associated with holding an object

The task of supporting an object with one or two hands was used to test the applicability of the notion of synergy. Subjects sat with their dominant forearm supported up to the wrist while holding a cylindrical “cup” between their thumb and fingers. Force transducers recorded the grip force applied normal to the cup's side by the thumb and the force applied normal to the cup bottom. On different series, a supporting force was added to and released from the bottom of the cup by the subject's non-dominant hand or by the experimenter. As predicted, the results indicated feedforward adjustments of the grip force, and of the EMGs, and significant correlations between grip force and supporting force when they were produced by two hands of one person, and the lack of such closely tied changes when the two forces were produced by two different persons. In the latter case, different subjects could demonstrate grip force changes in different directions. The findings suggest that grip force adjustments represented peripheral patterns of a single central process (a single synergy) rather than being separately controlled focal and postural components of the action.PsycINFO classification: 2330     

A decentralized computer network for supervision of multiple psychological laboratories

The computer network described was designed to optimize the use of a number of independent minicomputers as a single integrated system for process control of several research laboratories. The implementation of the network required both the development of a special purpose interprocessor interface and the design of a software support system to direct network operations. The network was designed according to the familiar “star” configuration, with the exception that the central computer in the star does not exercise exclusive supervisory control over the system. Rather, each computer on the system “sees” the central computer as a peripheral similar in characteristics to a medium speed I/O device. This design allows each computer to serve not only as a node in the network, but also as an entirely independent process controller.