Question 1

The intensity or brightness of light corresponds to the amplitude of the light wave.

Accepted Answer

The intensity or brightness of light is directly proportional to the amplitude of the light wave. In other words, the greater the amplitude of the wave, the brighter the light will appear.

Question 2

The intensity of a wave's pressure corresponds to a sound's pitch.

Accepted Answer

The intensity of a wave's pressure corresponds to a sound's volume or loudness, not its pitch. The pitch of a sound is determined by the frequency of the wave.

Question 3

There are three basic types of cones in the retina,each of which responds maximally to a different wavelength.

Accepted Answer

This is true. The three types of cones in the retina are sensitive to short, medium, and long wavelengths, corresponding to blue, green, and red colors, respectively.

Question 4

Dark adaptation is the process by which visual receptors become increasingly sensitive to dim light.

Accepted Answer

Dark adaptation is the ability of the eye to adjust to low levels of light over time, allowing us to see more clearly and with more detail in darker environments. This process involves the regeneration of the chemical rhodopsin in the rods of the retina, which increases their sensitivity to light. As a result, our pupils dilate and the number of signals sent to the brain increases, allowing us to see more effectively in low light conditions.

Question 5

A sound coming from your left will reach your left ear faster and with more intensity than it will reach your right ear.Your brain can use these two facts to compute the location of the sound's source.

Accepted Answer

This is known as the interaural time difference and interaural level difference, which are cues that the brain uses to determine the location of a sound source in space.

Question 6

When measuring absolute threshold,reliable detection is said to occur when a person can detect a signal 99 percent of the time.

Accepted Answer

The absolute threshold is defined as the minimum intensity at which a stimulus can be detected 50 percent of the time, not 99 percent.

Question 7

The terms sensation and perception have the same meaning and are interchangeable.

Accepted Answer

Sensation refers to the process of detecting and encoding stimuli from our environment, while perception involves interpreting and giving meaning to those sensory inputs. Therefore, the two terms have different meanings and cannot be used interchangeably.

Question 8

Despite the fact that we have only about 1000 different types of receptors,we can detect about 10 000 different odours.

Accepted Answer

This is due to the fact that each receptor can respond to multiple odours, and different combinations of receptors can result in different perceived smells.

Question 9

There are no effective treatments for phantom limb pain.

Accepted Answer

While there is no single cure for phantom limb pain, there are several treatments that have shown effectiveness for some individuals including medications, nerve blocks, physical therapy, and cognitive behavioral therapy.

Deck 4: A: Sensation and Perception