Answer:
This is an example of conservation.
Explanation:
Conservation is one of Jean Piaget's developmental accomplishments, in which a child understands that changing the form of a substance or object does not change its amount, volume, or mass. This is typically accomplished between the operational stage of development around ages 7 to 11. Therefore, it is typical for 4-year-olds to not be able to comprehend the concept of conservation.
Juan has hypersomnolence, while Miguel has narcolepsy. both men have sleep-wake disorders.
sleep-wake disorder is a medical term used to describe a variety of conditions in which a person feels excessively tired or sleeps longer than normal. Some researchers classify hypersomnia as primary or secondary. Primary hypersomnia is an isolated neurological disorder of unknown cause.
sleep-wake disorders may be caused by another sleep disorder (such as narcolepsy or sleep apnea), a dysfunction of the autonomic nervous system, or drug or alcohol abuse. In some cases, it is caused by physical problems such as tumors, head injuries, and central nervous system injuries.
Learn more about sleep-wake disorders here: brainly.com/question/28104028
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Answer: Valid
Explanation: There are two types of trials in Posner's attention experiments: valid and invalid. The first one is when a cue indicates exactly where the target would be appearing, meanwhile the invalid trial is when the cue indicate an erratic position of the target to be presented.
