Sensation and Perception Review

Which of the following is an example of the absolute threshold for touch?

• Feeling a bee’s wing falling a distance of 1 centimeter onto your cheek

• Hearing a watch tick 20 feet away

• Seeing a candle flame 30 miles away on a clear night

• Tasting 1 teaspoon of sugar dissolved in 2 gallons of water

Answer explanation

The absolute threshold for touch is the smallest detectable stimulus. Feeling a bee’s wing fall 1 centimeter onto your cheek is a clear example, as it represents the minimal sensation detectable by the skin.

What is an attentive process?

• Extracting information automatically and simultaneously when presented with stimuli

• A procedure that considers only one part of the stimuli presented at a time

• Ignoring all stimuli

• Focusing on a single stimulus

Answer explanation

An attentive process involves focusing on one part of the stimuli at a time, allowing for deeper analysis and understanding, which aligns with the correct choice. This contrasts with extracting information automatically.

Why is retinal disparity critical?

• For color perception.

• For depth perception.

• For night vision.

• For peripheral vision.

Answer explanation

Retinal disparity is critical for depth perception because it allows the brain to compare the slightly different images received from each eye, helping to gauge distance and spatial relationships between objects.

Which part of the eye controls the amount of light entering through the pupil?

• Retina

• Cornea

• Iris

• Lens

Answer explanation

The iris is the part of the eye that controls the size of the pupil, thereby regulating the amount of light that enters the eye. It adjusts in response to light conditions, making it the correct answer.

refers to the minimum amount of stimulus energy required to be detected 50% of

• absolute threshold

• difference threshold

• just noticeable difference

• transduction

Answer explanation

The absolute threshold refers to the minimum amount of stimulus energy needed for detection 50% of the time. This distinguishes it from the difference threshold and just noticeable difference, which relate to changes in stimuli.

What is the perception of light emitted or reflected from objects in the environment known as?

• Audition

• Olfaction

• Vision

• Gustation

Answer explanation

The perception of light emitted or reflected from objects is known as vision. It is the sensory process that allows us to interpret our surroundings through light, distinguishing it from other senses like audition (hearing) and olfaction (smell).

____________involves the conversion of sensory stimulus energy into neural impulses. occurs when sensory information is organized, interpreted, and consciously experienced.

• sensation

• perception

• transduction

• sensory adaptation

Answer explanation

Perception involves organizing and interpreting sensory information, leading to conscious experience. In contrast, sensation refers to the initial detection of stimuli, while transduction is the conversion of stimulus energy into neural impulses.

Awareness of internal and external changes, and Stimulus must excite a receptor and action potentials must reach the brain.

• sensation

• perception

• adaptation

• phasic receptors

• tonic receptors

Answer explanation

Sensation involves the awareness of internal and external changes, where stimuli excite receptors and action potentials are sent to the brain. This aligns with the definition of sensation, making it the correct choice.

Identify #2

• Retina

• Optic Nerve

• Pupil

• Cornea

Answer explanation

The cornea is the clear, outer layer of the eye that helps focus light. It is crucial for vision, making it the correct choice when identifying key parts of the eye.

Identify #3

• Iris

• Retina

• Lens

• Cornea

Answer explanation

The lens is a transparent structure in the eye that focuses light onto the retina. It adjusts its shape to help with focusing on objects at various distances, making it the correct answer for #3.