For a Wireless Device to Transmit Signals to a Computer

question 39

Multiple Choice

For a wireless device to transmit signals to a computer via infrared light waves, both the computer and the device must have which of the following?

• A) IrDA port
• B) FireWire port
• C) USB port
• D) either b or c

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Definitions:

Perceptual Invariance

The ability to perceive the unchanging properties of objects (shape, size, brightness, color) despite variations in the sensory input.

Absolute Threshold

The smallest amount of stimulation needed for a stimulus to be detected by the senses 50% of the time.

Just Noticeable Difference

The minimum difference in stimulation that a person can detect 50% of the time.

Absolute Threshold

The minimum intensity of a stimulus that one can detect 50% of the time, a concept central to the study of sensory processes.