Sensation, Perception, and Learning of Infants. THE INFANT'S SENSORY AND PERCEPTUAL CAPACITIES Unlocking the Secrets of Babies' Sensory Capabilities Infants' sensations and perceptions are no longer completely obscure to researchers, who have learned how to measure infants' sensory and perceptual capacities. In their efforts to understand whether babies can distinguish between one stimulus and another investigators often make use of the infant's tendency to habituate, or become used to, a given stimulus.
Another technique is to use the visual preference method, in which researchers pinpoint a baby's preference for one of two alternative stimuli. 4. sudden infant death syndrome Typically the infant is found dead after having been put to bed, and exhibits no signs of having suffered.  SIDS is a diagnosis of exclusion. It should only be applied to an infant whose death is sudden and unexpected and remains unexplained after the performance of an adequate postmortem investigation including: 1. an autopsy (by an experienced pediatric pathologist, if possible); 2. nvestigation of the death scene and circumstances of the death; 3. exploration of the medical history of the infant and family. Australia and New Zealand are shifting to the term "sudden unexplained death in infancy" (SUDI) for professional, scientific and coronial clarity. The term SUDI is now often used instead of sudden infant death syndrome (SIDS) because some coroners prefer to use the term 'undetermined' for a death previously considered to be SIDS. This change is causing diagnostic shift in the mortality data.  In addition, the U. S.
Centers for Disease Control and Prevention (CDC) has recently suggested that such deaths be called "sudden unexpected infant deaths" (SUID) and that SIDS is a subset of SUID.  4. Post partum depression Postpartum depression is depression that occurs soon after having a baby. Some health professionals callit postpartum nonpsychotic depression. •This condition occurs in about 10-20% of women, usuallywithina fewmonths of delivery. •Risk factors include previous major depression, psychosocial stress, inadequate social support, and previous premenstrual dysphoric disorder(see premenstrual syndromefor more information). Symptoms include depressed mood, tearfulness, inability to enjoy pleasurable activities, trouble sleeping, fatigue, appetite problems, suicidal thoughts, feelings of inadequacy as a parent, and impaired concentration. •If you experience postpartum depression, you may worry about the baby's health and well-being. You may have negative thoughts about the baby and fears about harming the infant (although women who have these thoughts rarely act on them). •Postpartum depression interferes witha woman'sability to care forher baby.
When a woman with severe postpartum depression becomes suicidal, she may consider killing her infant and young children, not from anger, but from a desire not to abandon thePostpartum (puerperal) psychosis is the most serious postpartum disorder. It requires immediate treatment. •This condition is rare. A woman with this condition experiences psychotic symptoms within 3 weeks of giving birth. These include false beliefs (delusions), hallucinations (seeing or hearing things that are not there), or both. •This condition is associated with mood disorders such as depression, bipolar disorder, or psychosis.