An empirical test of two psychophysical models

Two theoretical relationships between sensitivity measures (Weber fractions, Ekman fractions, and their logarithms) and the exponents of the psychophysical power function were tested empirically with the brightness attribute. One model was based on Weber and Ekman fractions, the other on the logarithms of these measures. The stimulus parameters were time interval between standard and comparison targets and position of the standard in the luminance series. Weber fractions were based on data obtained by the method of constant stimuli, whereas Ekman fractions and exponents were based on data obtained by magnitude estimation. The results were in closer agreement with the theoretical predictions generated by the logarithmic model when group data were analyzed. With individual subjects, a detailed correspondence between fact and theory was not found with either model.     

Predicting change in self-reported and interviewer-assessed adult attachment: tests of the individual difference and life stress models of attachment change

The study tested the key assumption of the individual difference model of adult attachment change: that people who have experienced certain vulnerability factors will be prone to change attachment styles because they have developed unclear models of self and others that render their attachment models unstable. This model was compared to a life stress model, which states that change occurs as an adaptation to new, interpersonally relevant life circumstances. Changes in self-reported and interviewer-assessed attachment were examined among 94 young adults who were followed over 1 year. Analyses yielded support for the individual difference model for change in both self-reported and interviewer-assessed attachment. The life stress model was supported for change in interviewer-assessed attachment only. Implications for differential change processes for self-reported versus interviewer-assessed aspects of adult attachment are discussed.     

Reliability and stability of adult attachment patterns

A basic premise of attachment theory is that internal models of attachment remain relatively stable across the life span. We examined stability and change in adult attachment representations over 8 months in a sample of young adults (N = 144; Mean age = 24.5 years). Attachment patterns were assessed by categorical and continuous ratings across three methods—self-report ratings, expert ratings based on semi-structured interviews, and reports of romantic partners—and showed moderate stability. Interview ratings tended to show higher stability than self-report ratings. Changes in attachment ratings (across methods) were not consistently related to life events that had occurred in the intervening 8 months. The relationship between reliability and stability was discussed, and where the “true” stability could be estimated independent of unreliability, it was found to be very high (r's ranging from .72 to .96). The results highlight the importance of using multiple indicators in assessing adult attachment and using continuous rather than categorical ratings in the assessment of stability.     

REM mentation in narcoleptics and normals: an empirical test of two neurocognitive theories

This study tested the two main neurocognitive models of dreaming by using cognitive data elicited from REM sleep in normals and narcoleptics. The two models were the "activation-only" view which holds that, in the context of sleep, overall activation of the brain is sufficient for consciousness to proceed in the manner of dreaming (e.g., Antrobus, 1991; Foulkes, 1993; Vogel, 1978); and the Activation, Input source, Modulation (AIM model), which predicts that not only brain activation level but also neurochemical modulatory systems exert widespread effects upon dreaming (Hobson & McCarley, 1977; Hobson, Pace-Schott, & Stickgold, 2000). Mental activity was studied in nocturnal REM in 15 narcoleptics and 9 normal healthy persons and in REM at the onset of daytime naps and nighttime sleep (SOREM) in narcoleptics. The study was performed in the subjects' homes, using instrumental awakenings and ambulatory polysomnographic techniques, and focused upon visual vividness, mentation report length, improbable and discontinuous bizarre features, and reflective consciousness. Within each subject group, most cognitive variables tended to fluctuate in line with expected variations in circadian activation level. When comparing the cognitive variables between the two groups, reflective consciousness was clearly highest in narcoleptics, whereas improbabilities and discontinuities were lower, with mentation report length and visual vividness differing less between the groups. These findings are consistent with the AIM model of sleep mentation, but not with the activation-only model.     

Maternal correlates of stability and change in infant-mother attachment

The relations between maternal control style, sensitivity, and childrearing attitudes on one hand and the stability of the infant-mother attachment relationship on the other were examined in a sample of 38 mother-infant dyads. The mother-child pairs were observed during a structured play session and in Ainsworth's Strange Situation when the infants were 12 and 20 months old, a developmental period characterized by increased autonomous functioning. Our results suggested that infants whose mothers had nonpunitive childrearing attitudes, were sensitive, and supportive of their infants' striving toward autonomy remained, or became, secure in their attachment relationship over their second year of life. Mothers who were more punitive, more controlling, and less sensitive had infants who either remained or became insecurely attached across this developmental period. While previous research has linked attachment stability to socioeconomic factors, the present investigation points to the importance of more subtle interactive variables to the understanding of the attachment relationship.     

An empirical test of two opposing theoretical models of prefrontal function.

The purpose of this study was to compare the validity of two models which contrast with each other in the manner in which they integrate neuropsychological tests into distinct prefrontal constructs. The first prefrontal model consists of five distinct functional constructs drawn from human clinical neuropsychology. The second model, elaborated by Goldman-Rakic, is based primarily on monkey research and postulates a basic prefrontal function, "on-line representational memory," which guides behavior in the absence of, or despite discriminative environmental stimuli. In the latter model, distinct prefrontal functional constructs are primarily defined in terms of various types of representational memory involved in specific tasks. Eleven "prefrontal" measures were obtained from 259 normal adults, stratified for age, education, and sex. Confirmatory factor analyses revealed that the Goldman-Rakic model "fit" the data better than the model derived from human clinical neuropsychology, while several constructs commonly used in human neuropsychology were refuted. It was concluded that new research on brain-damaged humans with a view to understanding prefrontal function might benefit from using the Goldman-Rakic model as a starting point.     

Individual differences in adult attachment: Disentangling two assessment traditions

The goal of this paper was to disentangle the contributions of type of measurement and relational domain to the lack of concordance between adult attachment measures. Eighty-six college students completed the Adult Attachment Interview (AAI) and self-reported measures of attachment security adapted to their relationships with four different relational partners. Results showed that whereas the AAI main dimensions were unrelated to self-reports relative to any partner, reports of attachment security with different partners were interrelated. Further, very few of the AAI State of Mind scales related to self-reported attachment security, but the AAI Experience scales did relate to self-reports in a theoretically consistent manner. Finally, the AAI scales of Idealization and Lack of Recall correlated positively with self-reported attachment when controlling for experiences reported on the AAI. The results suggest that a fundamental distinction between adult attachment measures could be the degree of automaticity of the constructs tapped, and that attachment self-reports may be biased by defensive information-processing strategies among dismissing individuals.     

A connectionist approach to the organization and continuity of working models of attachment

Most research on adult attachment dynamics has been conducted under the assumption that working models are generalized cognitive-motivational structures that are highly stable and activated in a wide array of circumstances. Recent research, however, suggests that people develop attachment representations that are relationship specific, leading them to hold distinct working models in different kinds of relationships. The objective of this article is to outline a connectionist approach to the working model construct that has the potential to explain how global and relationship-specific working models are organized within the same mental system and how different learning environments can support continuity in those representations over time.     

Classification of adult attachment: an integrative taxonomy from attachment and psychoanalytic theories.

Developmental and psychoanalytic theorists have focused increasingly on empirically determined early childhood antecedents of adult attachments, with several resulting taxonomic models. This article suggests a theoretically based and clinically based model of attachment consistent with both psychoanalytic and attachment theories, resulting in an integrative taxonomy of four adult attachment styles: dependent, avoidant, hostile, and resistant-ambivalent. These styles reflect behavioral manifestations of dependence and anger, as derived from the interaction of primitive relational drives, defenses, and interpersonal experience. In addition to theoretical construction, brief clinical examples are presented to facilitate discussion of the model.     

Unresolved attachment among immigrants: an analysis using the adult attachment projective

Dutch and Belgian immigrants in California have a high rate of unresolved attachment status compared to nonimmigrant Californians, unrelated to their length of time in the United States, to their marriage status, or to their reasons for immigration. In this study, the author analyzes attachment at the representational level by comparing coherence in responses of 69 immigrants (29 men and 40 women) and 30 nonimmigrants (12 men and 18 women) to drawings in the Adult Attachment Projective (AAP; C. George & M. L. West, 2001; C. George, M. L. West, & O. Pettem, 1999). Analysis of variance indicates that being unresolved with regard to attachment is linked to greater perception of danger in general, and to a lower ability to resolve danger once perceived. Resolution of danger in story responses to AAP images shows that the immigrant group is most troubled by images of departure and isolation, but nonimmigrants are most disturbed by images of illness.     

Measuring adult attachment: a construct validation of two self-report instruments

This study reports the Swedish construct validation of two translated attachment style scales. The factor structure of the attachment construct was investigated via exploratory and confirmatory factor analyses of attachment scores from 515 students of a Swedish university. Results supported the expected two-factor solution, but found a three-factor solution to be a viable alternative. In addition, the attachment scales were compared with the Big Five personality inventory (NEO-PI), using a sample of 87 Swedish students, and found to have expected correlation to this scale.     

Eysenck's theory of incubation: an empirical test

Eysenck's incubation of fear hypothesis that states that repeated CS-alone presentations can yield an increase in measures of fear was tested by first giving rats either a paired or an unpaired presentation of a tone CS and either a strong (3.5 mA), weak (1.05 mA) or no-shock US and then 10 daily CS-alone presentations. Over the CS-alone trials, conditioned fear, as measured by duration of freezing, latency to escape and activity scores, extinguished, rather than incubated.     

Assessment of adult relatedness: a review of empirical findings from object relations and attachment theories

Assessment techniques designed to measure adult behavior and mental representation that emphasize relatedness constructs are reviewed. These measures grow out of two traditions, object relations and attachment theories. Although these two paradigms are fairly well elucidated theoretically, the relevant assessment literature is only more recently expanding, especially that focusing directly on adult attachment as opposed to childhood attachment. In addition to a presentation of various projective and objective measures, this review highlights the clinical and research implications for integration of these two paradigms around the cognitive, affective, and behavioral vicissitudes of adult relatedness.     

The Adult Attachment Interview and self-reports of attachment style: an empirical rapprochement

Although 10 studies have been published on the empirical overlap of the Adult Attachment Interview (AAI) and measures of self-reported attachment style, results in this literature have been inconsistently interpreted in narrative reviews. This report was designed as a rapprochement of the AAI and attachment style literatures and includes 3 studies. Study 1 (combined N = 961) is a meta-analytic review showing that by J. Cohen's (1992) criteria (mean r = .09), the association between AAI security and attachment style dimensions is trivial to small. Study 2 (N = 160) confirms meta-analytic results with state-of-the-art assessments of attachment security and also examines attachment dimensions in relation to the Big 5 personality traits. Finally, Study 3 is an investigation of 50 engaged couples that shows that developmental and social psychological measures of attachment security predict somewhat distinct--though theoretically anticipated--aspects of functioning in adult relationships.     

Empowerment and team effectiveness: an empirical test of an integrated model

The authors developed a model of team empowerment as an emergent state linking inputs (I) with processes (P) and, thereby, with outcomes (O) in the context of an expanded team IPO framework. Using survey responses from 452 members of 121 empowered service technician teams, along with archival quantitative performance and customer satisfaction criteria, the authors tested the model using structural equation modeling techniques. The model was generally supported, although areas for improvement were evident. Specifically, empowerment partially mediated the influences of various inputs on team processes, whereas team processes fully mediated the influence of empowerment on outcomes. Directions for future research and application are discussed.     

Body image across the adult life span: stability and change

By far, the majority of studies investigating body image in adults have drawn samples from college populations within a very narrow age range. The purpose of the present paper is to review empirical research on the body image of adults older than the typical college student. There are marked changes in appearance across the adult life span, especially for women, which lead to the expectation of concomitant changes in body image. In fact, the review found that body dissatisfaction was remarkably stable across the adult life span for women, at least until they are quite elderly. In contrast, the importance of body shape, weight and appearance decreased as women aged, underscoring an important distinction between evaluation and importance of the body. However, there are many large gaps and limitations in the current literature that will need to be addressed before a more complete understanding of the development of body image across the adult life span is achieved.     

All-or-none-acquisition in matching-to-sample and a test of two models

Three pigeons learned to match three colors in a matching-to-sample procedure. The sample hue was presented on the center one of three keys, and the comparison hues were presented on the side keys. Forty responses on the center key produced the stimuli on the side keys and left the sample on the center key. A single response on the correct side key produced 3-sec access to grain, which was followed by a 25-sec intertrial interval. A correction procedure was employed when an error was committed. Before attaining asymptotic levels, there was no evidence of learning, responses were independent of the preceding response, and distributions of errors in four-trial blocks were binomial. Distributions of error runs, runs of various lengths, autocorrelations of errors of several lags, alternations of correct responses and errors, etc., were shown to fit Bower's (1961) all-or-none model better than a gradual learning model of Bush and Sternberg (1959). A transfer test employing a novel color showed only transitory degradation of performance.     

Laughter: an empirical test of some reversal theory hypotheses

Hypotheses derived from reversal theory on state-specific responses to humorous material were tested by recruitment of 10 telic (serious minded) and 10 paratelic (playful) state-dominant individuals from a larger sample of university students completing the Telic Dominance Scale. They were individually exposed to a comedy programme displayed on television in a psychophysiological laboratory. Polygraph record of respiration provided operational measurement of laughter. Subjects ratings were derived for felt and preferred level of arousal and for telidparatelic state in the laboratory situation. Results confirmed (1) that humorous material tends to induce the paratelic state, even in telic state-dominant individuals, and (2) that frequency of laughter in the paratelic state is positively correlated with degree of felt arousal and with arousal preference, thus indicating a linear , rather than ditonic, relation of hedonic tone to felt arousal in this state.