The 2nd to 4th digit ratio (2D:4D) and eating disorder diagnosis in women

Eating disorders are more common in females than in males and are believed to be caused, in part, by biological and hormonal factors. Digit ratio or 2D:4D (the ratio of the 2nd to the 4th digit) is considered to be a proxy for prenatal testosterone (PT) and prenatal oestrogen (PE) exposure. However, how 2D:4D may be related to type of eating pathology is unknown. The relationship between 2D:4D and eating disorder diagnosis was investigated in recovered and currently eating disordered (n = 31) and control (n = 99) women. Mean 2D:4D ratio was significantly lower (indicating higher levels of PT and lower levels of PE) in anorexic (AN) compared to bulimic (BN) women, with controls intermediary. In eating disordered women, 2D:4D was positively and significantly related to current weight, lowest weight and current BMI, with strongest associations for right 2D:4D. Among women, low 2D:4D is related to AN and high 2D:4D to BN, suggesting a differential causal influence of prenatal sex hormones on later eating pathology.     

Vection in depth during consistent and inconsistent multisensory stimulation

We examined vection induced during physical or simulated head oscillation along either the horizontal or depth axis. In the first two experiments, during active conditions, subjects viewed radial-flow displays which simulated viewpoint oscillation that was either in-phase or out-of-phase with their own tracked head movements. In passive conditions, stationary subjects viewed playbacks of displays generated in earlier active conditions. A third control, experiment was also conducted where physical and simulated fore-aft oscillation was added to a lamellar flow display. Consistent with ecology, when active in-phase horizontal oscillation was added to a radial-flow display it modestly improved vection compared to active out-of-phase and passive conditions. However, when active fore-aft head movements were added to either a radial-flow or a lamellar-flow display, both in-phase and out-of-phase conditions produced very similar vection. Our research shows that consistent multisensory input can enhance the visual perception of self-motion in some situations. However, it is clear that multisensory stimulation does not have to be consistent (i.e., ecological) to generate compelling vection in depth.     

Comparing measures of attachment: "To whom one turns in times of stress", parental warmth, and partner satisfaction

The Attachment and Clinical Issues Questionnaire (ACIQ; M. A. Lindberg & S. W. Thomas, 2011), was developed over an 18-year period containing 29 scales. The purpose of the present study was to test (a) the validity of the attachment scales in terms of how they predict to whom one turns in times of stress and for affective sharing, and (b) how the attachment scales compared with the Experiences in Close Relationship Questionnaire (ECR) in terms of concurrent, convergent, and discriminant evidence. The relevant secure scales of the ACIQ predicted to whom one turned in study 1, and study 2 demonstrated good convergent evidence with the ECR, but superior concurrent evidence in predicting partner satisfaction, and superior discriminant evidence in differentially correlating with mother and father warmth. Thus, the ACIQ passed essential validity and psychometric tests and was a more robust measure than the ECR with these defining characteristics of attachment.     

The Impact of the Family Environment on the Ethnic Identity Development of Multiethnic College Students

In this qualitative study of 5 multiethnic college students, the findings indicate that family environment played a significant role in the participants' ability to develop secure ethnic identities. The participants who described their family members as supportive of their multiple ethnic backgrounds also felt confident about their ethnic identity, whereas the participants who described their family members as unsupportive of their multiple ethnic backgrounds maintained that they often felt insecure about their ethnic identity.     

Infant sensitivity to audiovisually coherent events

Summary We examined 5-month-old infants' sensitivity to audiovisually coherent and incoherent events. A person speaking and an automobile with engine running were filmed approaching and receding with corresponding (coherent) soundtracks. Infants were tested with a habituation paradigm in which they observed coherent or incoherent films, involving, respectively, acoustical radial motion in the direction seen or opposite to the direction seen. Infants habituated to both person and car films, but coherent events uniformly yielded more rapid habituation than did incoherent ones. In addition, infants treated silent events more like audiovisual coherence than like incoherence. Infants habituated more to cars than to people, suggesting that a speaking person may especially maintain infant attention.     

Expert testimony on malingering: The admissibility of clinical procedures for the detection of deception

The detection of malingering in the legal context frequently requires the use of psychiatric and psychological expert testimony. These experts may rely on certain clinical techniques in order to detect deception. This article addresses the problem of the admissibility in evidence of clinical procedures used by these experts. The scientific reliability and effect on constitutional rights of procedures such as hypnosis, polygraphy, “truth” drugs, and psychological tests is examined.     

Habituation,memory, and the evaluative dimension of meaning

Two groups of subjects were exposed to a series of 20 either positively evaluated words (E⁺ group) or negatively evaluated words (E^? group). On the twenty-first trial, half the subjects in E⁺ group (the E^+? group) received a negatively evaluated word while the other half of the subjects received a further positively evaluated word (E⁺⁺ group). A similar subdivision was made with the E^? group to yield E^?+ and E^?? groups. Skin conductance responses to all stimulus words were measured. The responses of the E^+? and E^?+ groups were compared to those of their control groups (E⁺⁺ and E^??) for stimulus words 21 and 22. The results of these analyses, and the data concerning responses prior to stimulus word 21, indicated that subjects habituated to semantic stimuli of the same evaluative meaning. Memory for the words was assessed postexperimentally and its relationship to the orienting response in discussed.     

Auditory apparent motion in the free field: The effects of stimulus duration and separation

The effects of stimulus duration and spatial separation on the illusion of apparent motion in the auditory modality were examined. Two narrow-band noise sources (40 dB, A-weighted) were presented through speakers separated in space by 2.5°, 5°, or 100, centered about the subject’s midline. The duration of each stimulus was 5, 10, or 50 msec. On each trial, the sound pair was temporally separated by 1 of 10 interstimulus onset intervals (ISOIs): 0, 2, 4, 6, 8, 10, 15, 20, 50, or 70 msec. Five subjects were tested in nine trial blocks; each block represented a particular spatial-separation-duration combination. Within a trial block, each ISOI was presented 30 times each, in random order. Subjects were instructed to listen to the stimulus sequence and classify their perception of the sound into one of five categories: single sound, simultaneous sounds, continuous motion, broken motion, or successive sounds. Each subject was also required to identify the location of the first-occurring stimulus (left or right). The percentage of continuous-motion responses was significantly affected by the ISOI [F(9,36) = 5.67,p < .001], the duration × ISOI interaction [F(18,72) = 3.54,p < .0001], and the separation × duration × ISOI interaction [F(36,144) = 1.51,p < .05]. The results indicate that a minimum duration is required for the perception of auditory apparent motion. Little or no motion was reported at durations of 10 msec or less. At a duration of 50 msec, motion was reported most often for ISOIs of 20–50 msec. The effect of separation appeared to be limited to durations and-ISOIs during which little motion was perceived.     

Gender Differences in Pain Perception: The Mediating Role of Self-Efficacy Beliefs

The purpose of this study was to assess the extent to which the gender differences in response to the cold pressor test (CPT) are mediated by self-efficacy beliefs. One hundred twelve college undergraduates (69 women and 43 men) engaged in CPT and completed self-report measures of demographic information, physical self-efficacy (i.e., expectations about one's overall physical capabilities), and task-specific self-efficacy (i.e., beliefs about one's ability to cope successfully with the upcoming CPT). In addition, participants provided subjective ratings of pain intensity every 30 s during CPT and were evaluated for tolerance during CPT (up to 4 min). Consistent with past research, men reported lower average subjective ratings of pain intensity and showed higher tolerance for CPT. Path analyses indicated that associations between gender and pain perception were fully mediated by self-efficacy beliefs. Men reported greater physical self-efficacy and task-specific self-efficacy than women did. In turn, higher task-specific self-efficacy ratings predicted increases in tolerance for pain and lower ratings of average pain intensity. Findings indicate that self-efficacy beliefs are one factor that accounts for gender differences in responses to painful stimulation. Future researchers should evaluate conditions under which heightened self-efficacy may be beneficial and harmful, and they should employ experimental designs that incorporate opportunities for use of both communal–interpersonal and individualistic coping strategies in light of possible gender differences in preferred approaches to coping with pain.     

EVALUATION AND TRAINING OF YES‐NO RESPONDING ACROSS VERBAL OPERANTS

Topographically similar verbal responses may be functionally independent forms of operant behavior. For example, saying yes or no may have different functions based on the environmental conditions in effect. The present study extends previous research on both the assessment and acquisition of yes and no responses across contexts in children with language deficits and further examined the functional independence of topographically similar responses. All participants in the present study acquired yes and no responses within verbal operants (e.g., mands). However, generalization of the responses across novel verbal operants (e.g., tacts to intraverbals) did not occur without additional training, thus supporting Skinner's (1957) assertion of functional independence of verbal operants.