CEA Human Factors Engineering 2

Question 1

Which signal detection theory measure reflects a person's ability to discriminate a signal from noise, independent of response bias?

Accepted Answer

d-prime (d')

Answer

d-prime (d') is the sensitivity index in signal detection theory that measures discriminability independent of the observer's decision criterion.

Question 2

The Fitts' Law formula MT = a + b log2(2A/W) predicts movement time based on which two variables?

Accepted Answer

Amplitude and target width

Answer

Fitts' Law predicts movement time using amplitude (distance to target) and target width, where a wider target or shorter distance reduces movement time.

Question 3

Which memory system has the largest capacity and longest duration but requires encoding for information to be retained?

Accepted Answer

Long-term memory

Answer

Long-term memory has virtually unlimited capacity and indefinite duration, but information must be encoded through rehearsal or meaningful association.

Question 4

In human factors, 'situation awareness' (SA) is best defined as:

Accepted Answer

Perception, comprehension, and projection of environmental elements

Answer

Mica Endsley's model defines SA as three levels: perception of elements, comprehension of their meaning, and projection of future status.

Question 5

The 'population stereotype' concept in human factors refers to:

Accepted Answer

The expected direction of control movement that most people intuitively associate with a display change

Answer

Population stereotypes describe the control-display movement relationships that a majority of users expect, such as turning a knob clockwise to increase a value.

(CEA) Certified Ergonomics Associate Practice Test

(CEA) Certified Ergonomics Associate Practice Test

CEA Human Factors Engineering 2