Functional images were collected using 31 transversal slices 4-mm slice thickness with 3. The morph continua used were assigned to the [0 1] interval for analysis and display purposes. The order of the presentation of the stimuli and rating items was randomized and balanced across participants. The second objective was to identify a pattern of cognitive characteristics in children with DS. To assess the possible confounding factors, participants also rated familiarity i. Low-level memory processes in vision. For the participants with DS Table 6 , the facial expression of sadness presented significant positive correlations with the following cognitive tests, IQ, and factorial indices:
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This study had some limitations. There is a wide range of normal development in children. Consulting Psychologists Press; The results showed significant differences in the perception of expressions of disgust, surprise, and fear Table 4 , in which the children with DS had lower accuracy than the children in the TDC group. Behavioural Brain Research , 32, — The perception of faces is one of the most developed human abilities.
 Facial Gesture Recognition Using Correlation And Mahalanobis Distance
Stuttering is a disruption in the fluency of speech, either by repetition, prolongation, or block on sounds, words, or phrases. Behavioural Neurology , 12, — Neuroticism is characterized by the tendency to be anxious, nervous, and hostile [ 3 , 4 ]. Based on their tendency to withdraw from facial expressions [ 8 , 15 ], we predicted that high-neuroticism participants, relative to low-neuroticism participants, would show slower detection of facial targets over both emotional and neutral expressions. Children may be very literal, miss subtle cues, and have trouble understanding and relaying the most important information. Then, they determined the positions of the feature points for the anti-expressions by moving each point of the neutral expressions by the same distance as for normal expressions but in the opposite direction.
Secondly, in the whole-brain analysis of the fMRI data we found no significant differences in activations of the cortical areas known to be involved in programming and execution of eye movements i. Facial emotions are important cues of human social interactions. Executive Function Difficulties occur when a child has trouble with planning, abstract thinking, flexibility, and self-regulation. Range- and domain-specific exaggeration of facial speech. Therefore, it remains undetermined whether participants with high- and low-neuroticism levels could differ in their detection of emotional versus neutral expressions. To test the between-response variability vs.