The Sleep Cycle app uses the accelerometer in your iPhone to detect your movements while you sleep. You move in different ways throughout the night, and these movements are tied in with the different phases of sleep you pass through, from light sleep, to REM sleep to deep sleep, and back again.
A skills assessment is typically utilized in professional environments in which it is used to evaluate the productivity and professional potential of a person. This type of assessment can be used to analyze how well a possible new-hire might fit into a particular environment.
Some cognitive ability tests sum up the correct answers to all of the items to obtain an overall score that represents a measure of general mental ability. If an individual score is computed for each of the specific types of abilities (e.g., numeric, verbal, reasoning), then the resulting scores represent measures of the specific mental abilities.