Sensation

What is a stimulus?

• the action of picking up an object

• any aspect of or change in the environment to which an organism responds

• the organization of sensory information into meaningful experiences

• the relationship between color and wavelength

What occurs when one's skin notes that the room just got colder?

• sensation

   

•  perception

   

• threshold

   

• analysis

What is a perception?

• a change in the environment to which an organism responds

   

• the relationship between color and wavelength

   

• the minimum amount of stimulus necessary for a person to sense it

   

• the organization of sensory information into meaningful experiences

If a machine is flashing a light that is too weak for a person to see, that light has not reached the

 

• intensity marker.

• visibility barrier.

• absolute threshold.

   

• experiment minimum.

The difference threshold refers to

 

• the minimum amount of stimuli a person can detect.

   

• the amount of difference a person can detect between two stimuli.

   

• the difference between visual and auditory stimuli.

   

• the maximum amount of stimuli a person can withstand.

Adding one ounce of water to a pitcher already containing a full gallon would be less noticeable than adding a half-ounce of water to an empty pitcher. This illustrates the concept of

You do not feel the constant pressure of your clothes on one's body because

•  the clothes are too light to reach the absolute threshold.

•  clothing produces too great of a difference threshold.

• your senses adapt to the ongoing stimulation provided by the clothes.

• visual and auditory senses override the sensation of touch.

Preattentive process refers to

 

• automatic processing of stimuli.

   

• considering one part of the stimuli at a time.

   

• increasing motivation to process stimuli.

   

• the ability to notice less distinct forms of stimuli.

Changes in heat and pressure are noted by the skin.

• TRUE

• FALSE

If a person sees a faint light half the time it appears, then the visual stimulus has reached the absolute threshold.

• TRUE

• FALSE