The perception of emotion from body movement in point-light displays of interpersonal dialogue

We examined whether it is possible to identify the emotional content of behaviour from point-light displays where pairs of actors are engaged in interpersonal communication. These actors displayed a series of emotions, which included sadness, anger, joy, disgust, fear, and romantic love. In experiment 1, subjects viewed brief clips of these point-light displays presented the right way up and upside down. In experiment 2, the importance of the interaction between the two figures in the recognition of emotion was examined. Subjects were shown upright versions of (i) the original pairs (dyads), (ii) a single actor (monad), and (iii) a dyad comprising a single actor and his/her mirror image (reflected dyad). In each experiment, the subjects rated the emotional content of the displays by moving a slider along a horizontal scale. All of the emotions received a rating for every clip. In experiment 1, when the displays were upright, the correct emotions were identified in each case except disgust; but, when the displays were inverted, performance was significantly diminished for some emotions. In experiment 2, the recognition of love and joy was impaired by the absence of the acting partner, and the recognition of sadness, joy, and fear was impaired in the non-veridical (mirror image) displays. These findings both support and extend previous research by showing that biological motion is sufficient for the perception of emotion, although inversion affects performance. Moreover, emotion perception from biological motion can be affected by the veridical or non-veridical social context within the displays.     

Fear information and social phobic beliefs in children: a prospective paradigm and preliminary results

This paper presents a first attempt to develop a prospective paradigm to test Rachman's (Behav. Res. Ther. 15 (1977) 375) theory of fear acquisition for social fears. Following the prospective paradigm for animal fears developed by Field et al. (Behav. Res. Ther. 39 (2001) 1259) an attempt is made to adapt this paradigm to look at the effect of fear information in the development of social fears. A large group of normal children (N=135) who were at an age (10-13 years) at which social concerns are most pertinent were tested using this paradigm. They were given positive, negative or neutral information about three social situations: public speaking, eating in public, and meeting a new group of children. Children's fear beliefs were measured before and after the information was given and the information was given by a teacher, a same age peer or no information was given (a control). The results indicate that although information can change social fear beliefs it is dependent upon the type of social activity and who provides the information. The implications of these initial results for our understanding of both the role of fear information in the development of social fear beliefs, and the limitations of this current paradigm are discussed.     

Prism adaptation to dynamic events

In the present study, we explored adaptation to prism-displaced dynamic and static events under conditions of minimal information. Many of our interactions with the world are dynamic and involve reaching for or intercepting moving objects. The consequences (or feedback) of those interactions entail the presence or absence of physical contact with the moving objects. In this study, humans learned, with only heptic feedback, to intercept optically displaced falling balls. To eliminate visual feedback, the falling balls disappeared behind an occluder (which systematically varied in size across groups) prior to either striking or missing a subject's hand. As occluder size decreased, adaptation increased. With minimum occluder sizes, the greatest adaptation occurred around the training position, and adaptation decreased as distance between training and testing positions increased. The results can best be described in terms of a generalization gradient centered around the training position. This generalization gradient was not present when subjects were trained with ecologically similar static arrays. Implications for models of adaptation are discussed.     

Measuring Memory Span

This study, conducted on a sample of 403 adult subjects, set out to explore the relationships between measures of digit span (forward and reversed), motor and spatial span, and their dependence on a broad range of measures of cognitive function. The results revealed that measures of digit span are closely related, as are measures of motor and spatial span, but these pairs of memory span measures are relatively independent of each other. Furthermore, reverse digit span, motor span, and spatial span appear to rely on what might be regarded as intellectual or executive cognitive functions. As such, the results provide little support for accounts of serial recall, which suggest that order and/or item information are more adequately modelled in a modality-independent form.     

Depressed mothers' assessments of their neonates' behaviors

Neonates were assessed at delivery and again at 1 month by examiners and by their depressed or nondepressed mothers. Examiner assessments were conducted using the Brazelton Neonatal Behavioral Assessment Scale (NBAS). Maternal assessments were conducted by mothers using a simplified version of the NBAS, the Mother's Assessment of the Behavior of her Infant (MABI). Examiners rated neonates of depressed mothers lower than infants of nondepressed mothers on state organization. At delivery, newborn infants of depressed mothers were given lower state regulation scores by their mothers than by the examiners and, 1 month later, examiners’ state regulation ratings were as negative as those of the depressed mothers. Conversely, infants of nondepressed mothers were given higher social interaction scores by their mothers than by the examiners, and 1 month later, examiner ratings of social interaction were as positive as those of the nondepressed mothers. These findings suggest that infants of depressed mothers may be placed at risk by prenatal influences and by risks associated with maternal perceptions. Perceptions of infants appear to be colored by maternal depression status as early as the immediate postpartum period and, though “subjective,” these perceptions are predictive of infant outcomes.     

Touch by Intrusive and Withdrawn Mothers with Depressive Symptoms

Interaction behaviours of 88 adolescent mothers with depressive symptoms and their 3-month-old infants were videotaped and coded for different types of touch. The ‘depressed’ mothers were classified as intrusive, withdrawm or good by one observer and another observer coded rough tickling, poking, tugging and pulling as negative touch behaviours and gentle stroking and rubbing as positive touch behaviours. The mothers with depressive symptoms were more likely to touch their infants in a negative way and more likely to be classified as intrusive.     

Less exploring by mouth occurs in newborns of depressed mothers

Twenty‐four newborns (M age = 12 days) of depressed and nondepressed mothers were assessed for oral perception of a nubby and smooth texture. Both groups of newborns discriminated between these textures and showed a sucking preference for the smooth texture. However, the newborns of depressed mothers spent 50% less time orally exploring the stimuli, one‐third less time exploring the more novel nubby texture, and 59% less time mouthing the smooth texture. Newborns of depressed mothers may have biological differences that affect their emotional arousal and emotional regulation (e.g., capacity for self‐soothing). © 2000 Michigan Association for Infant Mental Health.     

Infants' responses to mothers' imitative behaviors

Several investigators have suggested that young infants' smiles and vocalizations following their mothers' imitative behaviors might reflect infant recognition that the mother's behavior is imitative or at least contingent. This study investigated whether infants smile and vocalize more frequently subsequent to maternal imitative than non-imitative behavior during both spontaneous and imitative face-to-face interactions. Fourteen 3 1/2-month-old infants and their mothers were videotaped in these two face-to-face interaction situations. The infants vocalized more frequently during the imitative situation and infant vocalizations plus simultaneous smiling, and vocalizations occurred more often following maternal imitative than non-imitative behavior. Although these data suggest that infant vocalizations and simultaneous smiles and vocalizations may reflect the infants' recognition of maternal imitative behavior, they do not establish definitively that it is the imitation per se vs. the contingency aspect that is recognized by the infant.     

Moderately dysphoric mothers behave more positively with their infants after completing the BDI

To determine whether mildly and moderately dysphoric adolescent mothers display infantized facial and vocal behaviors, 21 nondysphoric mothers and 32 dysphoric (16 mildly and 16 moderately/severely dysphoric) mothers were videotaped during face-to-face interactions with their 4-month-old infants. Mildly dysphoric mothers showed less positive facial expressions and less animated/exaggerated vocal expressions. The moderately/severely dysphoric mothers, however, did not differ from nondysphoric mothers in their display of facial and vocal behaviors. These mothers with higher Beck Depression Inventory (BDI) scores may have become concerned about their many symptoms affecting their interactions and tried to compensate for this during their interactions. A second study was conducted to determine whether completing the BDI before interactions positively affected the moderately/severely dysphoric mothers' behavior. Moderately/severely dysphoric mothers (N=24) and mildly dysphoric mothers (N=24) were given the Beck Depression Inventory either before or after their face-to-face interactions with their 4-month-old infants. Moderately/severely dysphoric mothers who were given the BDI before their interactions showed more positive behavior than mothers given the BDI after their interactions. © 1997 Michigan Association for Infant Mental Health