Communicative Signals Promote Object Recognition Memory and Modulate the Right Posterior STS
| Autor: | Simren Kanwal, Elizabeth Redcay, Ruth S. Ludlum, Kayla Velnoskey |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Male
Universities Cognitive Neuroscience Context (language use) Fixation Ocular Neuropsychological Tests 050105 experimental psychology Functional Laterality 03 medical and health sciences 0302 clinical medicine Image Processing Computer-Assisted Psychophysics Humans 0501 psychology and cognitive sciences Attention Students Recognition memory Cerebral Cortex Communication Analysis of Variance Gestures business.industry 05 social sciences Cognitive neuroscience of visual object recognition Recognition Psychology Fixation (psychology) Social learning Gaze Magnetic Resonance Imaging Oxygen Female Cues business Psychology 030217 neurology & neurosurgery Ostensive definition Photic Stimulation Gesture |
| Zdroj: | Journal of cognitive neuroscience. 28(1) |
| ISSN: | 1530-8898 |
| Popis: | Detection of communicative signals is thought to facilitate knowledge acquisition early in life, but less is known about the role these signals play in adult learning or about the brain systems supporting sensitivity to communicative intent. The current study examined how ostensive gaze cues and communicative actions affect adult recognition memory and modulate neural activity as measured by fMRI. For both the behavioral and fMRI experiments, participants viewed a series of videos of an actress acting on one of two objects in front of her. Communicative context in the videos was manipulated in a 2 × 2 design in which the actress either had direct gaze (Gaze) or wore a visor (NoGaze) and either pointed at (Point) or reached for (Reach) one of the objects (target) in front of her. Participants then completed a recognition memory task with old (target and nontarget) objects and novel objects. Recognition memory for target objects in the Gaze conditions was greater than NoGaze, but no effects of gesture type were seen. Similarly, the fMRI video-viewing task revealed a significant effect of Gaze within right posterior STS (pSTS), but no significant effects of Gesture. Furthermore, pSTS sensitivity to Gaze conditions was related to greater memory for objects viewed in Gaze, as compared with NoGaze, conditions. Taken together, these results demonstrate that the ostensive, communicative signal of direct gaze preceding an object-directed action enhances recognition memory for attended items and modulates the pSTS response to object-directed actions. Thus, establishment of a communicative context through ostensive signals remains an important component of learning and memory into adulthood, and the pSTS may play a role in facilitating this type of social learning. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|