Detection of Modality-Specific Properties in Unimodal and Bimodal Events during Prenatal Development

Vaillant, Jimena

doi:10.25148/etd.fi10112012

Cited by 2 publications

(1 citation statement)

References 39 publications

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“…Color, for example, is a modality specific property because it offers information to only the visual sensory modality. Nonredundant (unimodal or temporally asynchronous) presentations provide information about modality specific properties such as orientation (Bahrick, Lickliter, & Flom, 2006), color (Vaillant-Molina, Gutierrez, Bahrick, 2005), pitch (Vaillant, Bahrick, & Lickliter, 2008), information that underlies person identification such as facial features and their arrangement (Bahrick, Argumosa, Lopez, & Todd, 2009;Bahrick, Lickliter, Vaillant, Shuman, & Castellanos, 2004a;Vaillant-Molina, Newell, Castellanos, Bahrick, & Lickliter, 2006), and voice identification such as pitch and timbre (Bahrick, Lickliter, Shuman, Batista, & Grandez, 2003).…”

Section: Unimodal Facilitationmentioning

confidence: 99%

Infants’ Selective Attention to Faces and Prosody of Speech: The Roles of Intersensory Redundancy and Exploratory Time

Castellanos¹

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Section: Unimodal Facilitationmentioning

confidence: 99%

Infants’ Selective Attention to Faces and Prosody of Speech: The Roles of Intersensory Redundancy and Exploratory Time

Castellanos¹

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Tests of the Intersensory Redundancy Hypothesis across Early Postnatal Development

Vaillant‐Mekras¹

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The Intersensory Redundancy Hypothesis (IRH; , 2012 predicts that early in development information presented to a single sense modality will selectively recruit attention to modality-specific properties of stimulation and facilitate learning of those properties at the expense of amodal properties (unimodal facilitation).Vaillant (2010) demonstrated that bobwhite quail chicks prenatally exposed to a maternal call alone (unimodal stimulation) are able to detect a pitch change, a modality-specific property, in subsequent postnatal testing between the familiarized call and the same call with altered pitch. In contrast, chicks prenatally exposed to a maternal call paired with a temporally synchronous light (redundant audiovisual stimulation) were unable to detect a pitch change. According to the IRH (Bahrick & Lickliter, 2012), as development proceeds and the individual's perceptual abilities increase, the individual should detect modality-specific properties in both nonredundant, unimodal and redundant, bimodal conditions. However, when the perceiver is presented with a difficult task, relative to their level of expertise, unimodal facilitation should become evident. The first experiment of the present study exposed bobwhite quail chicks 24 hr after hatching to unimodal vi auditory, nonredundant audiovisual, or redundant audiovisual presentations of a maternal call for 10min/hr for 24 hours. All chicks were subsequently tested 24 hr after the completion of the stimulation (72 hr following hatching) between the familiarized maternal call and the same call with altered pitch. Chicks from all experimental groups (unimodal, nonredundant audiovisual, and redundant audiovisual exposure) significantly preferred the familiarized call over the pitch-modified call. The second experiment exposed chicks to the same exposure conditions, but created a more difficult task by narrowing the pitch range between the two maternal calls with which they were tested.Chicks in the unimodal and nonredundant audiovisual conditions demonstrated detection of the pitch change, whereas the redundant audiovisual exposure group did not show detection of the pitch change, providing evidence of unimodal facilitation. These results are consistent with predictions of the IRH and provide further support for the effects of unimodal facilitation and the role of task difficulty across early development.

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Detection of Modality-Specific Properties in Unimodal and Bimodal Events during Prenatal Development

Cited by 2 publications

References 39 publications

Infants’ Selective Attention to Faces and Prosody of Speech: The Roles of Intersensory Redundancy and Exploratory Time

Infants’ Selective Attention to Faces and Prosody of Speech: The Roles of Intersensory Redundancy and Exploratory Time

Tests of the Intersensory Redundancy Hypothesis across Early Postnatal Development

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