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Manipulated Infant Gender Effects on Maternal Sensory Sensitivity to Infant Affective Signaling: Signal Detection Analysis

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Abstract:

Background and Aims: Signal detection methodology is applied to the study of mother-infant interaction in order to separate maternal sensory sensitivity to infant affective signals from response bias. For the infant, affective signals are the primary means of communication by which he or she engages the caregiver. The mother relies on changes in her infant’s facial and vocal expression to provide her with feedback as she attempts to regulate the infant’s affect. Gender related patterns in mother’s response to the infant’s affective displays have been reported. Using signal detection methodology, this study examined differences in mothers’ sensory sensitivity and response bias to infants’ positive and negative expressions as influenced by labeling the stimulus ‘male’ or ‘female.’

Methods: Sixty-nine mothers, each with a 6-month-old infant, participated in the signal detection task. This methodology measures sensory sensitivity independent of response bias which affects the decision-making process. The task assessed mothers' ability to differentiate between the standard of a given facial expression and one of six variants which differed slightly along a continuum of morphed pictures varying in affect intensity. Mothers were randomly assigned to receive either the male or female label. For each of the two stimulus sets (positive and negative expression), two measures were calculated: 1) sensory sensitivity–the ability to differentiate between the standard and a given variant and 2) response bias – a same/different response preference.

Key Results: A MANOVA yielded a gender manipulation effect on sensory sensitivity to the positive expression, p < .02, and a marginal effect on the negative expression, p < .09. Lower scores reflect greater sensitivity. Mothers who received the female manipulation were 1) more sensitive to the positive expression (M = 2.43) compared to mothers receiving the male manipulation (M = 3.10), and 2) more sensitivity to negative expression (M = 2.74) compared to those receiving the male manipulation (M = 3.04). Also, mothers who received the female manipulation had a response bias reflecting a tendency toward pressing the different response choice compared with the same response choice (M = .57) compared with those who received the male manipulation (M = .74) which indicated no response bias, p < .02.

Conclusions: These results demonstrate advantages of signal detection methodology in examining the unique contribution of signal processing and responses bias in mothers’ response to infants’ affective signaling. The study has identified early differences in maternal response as a function of gender which has implications for the gendered socialization of emotion.

Author's Keywords:

infant gender, infant affective signaling, maternal sensitivity, signal detection analysis
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Association:
Name: XVth Biennial International Conference on Infant Studies
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http://www.isisweb.org


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URL: http://www.allacademic.com/meta/p93748_index.html
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MLA Citation:

Donovan, Wilberta., Leavitt, Lewis. and Taylor, Nicole. "Manipulated Infant Gender Effects on Maternal Sensory Sensitivity to Infant Affective Signaling: Signal Detection Analysis" Paper presented at the annual meeting of the XVth Biennial International Conference on Infant Studies, Westin Miyako, Kyoto, Japan, Jun 19, 2006 <Not Available>. 2009-05-25 <http://www.allacademic.com/meta/p93748_index.html>

APA Citation:

Donovan, W. , Leavitt, L. and Taylor, N. , 2006-06-19 "Manipulated Infant Gender Effects on Maternal Sensory Sensitivity to Infant Affective Signaling: Signal Detection Analysis" Paper presented at the annual meeting of the XVth Biennial International Conference on Infant Studies, Westin Miyako, Kyoto, Japan <Not Available>. 2009-05-25 from http://www.allacademic.com/meta/p93748_index.html

Publication Type: Conference Paper/Unpublished Manuscript
Abstract: Background and Aims: Signal detection methodology is applied to the study of mother-infant interaction in order to separate maternal sensory sensitivity to infant affective signals from response bias. For the infant, affective signals are the primary means of communication by which he or she engages the caregiver. The mother relies on changes in her infant’s facial and vocal expression to provide her with feedback as she attempts to regulate the infant’s affect. Gender related patterns in mother’s response to the infant’s affective displays have been reported. Using signal detection methodology, this study examined differences in mothers’ sensory sensitivity and response bias to infants’ positive and negative expressions as influenced by labeling the stimulus ‘male’ or ‘female.’

Methods: Sixty-nine mothers, each with a 6-month-old infant, participated in the signal detection task. This methodology measures sensory sensitivity independent of response bias which affects the decision-making process. The task assessed mothers' ability to differentiate between the standard of a given facial expression and one of six variants which differed slightly along a continuum of morphed pictures varying in affect intensity. Mothers were randomly assigned to receive either the male or female label. For each of the two stimulus sets (positive and negative expression), two measures were calculated: 1) sensory sensitivity–the ability to differentiate between the standard and a given variant and 2) response bias – a same/different response preference.

Key Results: A MANOVA yielded a gender manipulation effect on sensory sensitivity to the positive expression, p < .02, and a marginal effect on the negative expression, p < .09. Lower scores reflect greater sensitivity. Mothers who received the female manipulation were 1) more sensitive to the positive expression (M = 2.43) compared to mothers receiving the male manipulation (M = 3.10), and 2) more sensitivity to negative expression (M = 2.74) compared to those receiving the male manipulation (M = 3.04). Also, mothers who received the female manipulation had a response bias reflecting a tendency toward pressing the different response choice compared with the same response choice (M = .57) compared with those who received the male manipulation (M = .74) which indicated no response bias, p < .02.

Conclusions: These results demonstrate advantages of signal detection methodology in examining the unique contribution of signal processing and responses bias in mothers’ response to infants’ affective signaling. The study has identified early differences in maternal response as a function of gender which has implications for the gendered socialization of emotion.

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