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SPATIAL FREQUENCY

the number of elements that repeat in a pattern over a certain distance. For more understanding, you may study contrast

SPECIAL NEEDS

the requirements of a person with a physical, mental, emotional or financial disability. Special needs vary from person to person.

SPECIFIC PHOBIA

an anxiety disorder that used to be called a simple phobia that was marked by a persistent fear of an

SPECTRAL ABSORPTION

The ability of different chemicals to absorb different wavelengths of light. This can be determined by passing lights of almost

SPEECH AREA

the area of our cerebral cortex that deals with speech. The speech areas are situated in the left hemisphere in

SPEECH THERAPY

Any therapies and remedies used to improve speech function.

SPIKE-WAVE ACTIVITY

the pattern produced by an action potential of a neuron when amplified and projected onto the screen of an oscilloscope

SPINDLE WAVES

These are the wave patterns of light sleep. See sleep spindles.

SPLIT BRAIN

brain that has been cut into 2 hemispheres and is used on animals in experiments to see what part does

SPONTANEOUS MEMORIALIZATION

a public response to a violent and unexpected death. Messages and flowers are placed at the site. See traumatic grief.

SPORT SCIENCE

The application of biophysical and social scientific methods to study sport behaviour.

SQUEEZE TECHNIQUE

technique used for overcoming premature ejaculation. The penis is stimulated until the man is well aroused, then the partner squeezes

STABILIZED IMAGE

an image on our retina that won't move when your move you eye. Even the smallest movement will refresh an

STAIRCASE METHOD

where stimuli are presented in ascending and descending order. When the response of the observer changes so does the direction.

STANDARD OBSERVER

Hypothetically, the ideal observer.

STANINE

a division of scores into 9 parts with a normal distribution. The mean of this scale is 5 with the

STATEMENT VALIDITY ANALYSIS

These are the techniques applied to see if a child is telling the truth about sexual abuse. For more understanding

STATISTICS

Branch of mathematics that uses data descriptively and to infer and support answers to scientific questions.

STELLATE CELL

A nerve cell that has many branches. See cortical layers.