E-modules/knowledge clips week 2

Question 1

definition discrimination tests

Answer 1

used to determine whether samples are perceptibly different
limits:
- only with subtle differences possible
- only 2 samples, more is laborious and error sensitive
- no direction of the differences

Question 2

duo-trio testing

Answer 2

3 samples presented at the same time
- indicate which of 2 is similar to reference material

ref + A + B

Question 3

A-not_a test

Answer 3

difference between 2 samples
- first sample A, then a second sample: same or different?

A | X

Question 4

triangle test

Answer 4

difference between 2
- 3 samples at the same time ( 2 identical, 1 different

A + B + (A or B)

Question 5

same-different test

Answer 5

difference between 2
- 2 blind coded samples at the sa,e
- indicate whether same or different

(A or B) + (A or B)

Question 6

reversed duo-trio test (ABX discrimination)

Answer 6

• presented with A&B
• then sample x
• indicate if x looks like A or B

A + B | X

Question 7

Tetrad test

Answer 7

differences between 2
- 4 samples presented
- cluster them in 2 groups

A + B + A + B

Question 8

Two out of five

Answer 8

• presented with 5 samples
• devide 2 groups on similarity

Question 9

difference from control

Answer 9

• control + codes sample presented
• determine if there’s a difference in magnitude on a scale

Question 10

paired comparison

Answer 10

• 2 samples given
• asked which one has greatest intensity on 1 attribute

Question 11

three alternative forced choice

Answer 11

3 blind coded samples, 2 same, 1 different
- aksen which sample has greatest intensity

Question 12

harris-kalmus test

Answer 12

8 samples
- divide into 2 groups
- 4 times done for 2 samples

Question 13

signal detection theory

Answer 13

= method used to determine the ability of a subject to detect a very weak stimulus among rise
- noise or sois + signal
- detection of stimulus is a matter of decision making based on:
1. sensory info (signal and noise)
2. criterion of the subject (when subject says yes)

Question 14

difference threshold

Answer 14

minimum amount in which 2 stimuli should differ to be able to discriminate them
- increase needed to produce a noticeable increase in sensation

Question 15

absolute threshold

Answer 15

level below which no sensation would be produced by a stimulus and above which a sensation would reach consciousness

Question 16

value of difference

Answer 16

difference between means of signal+noise & noise distribution

Question 17

signal/no signal & yes/no

Answer 17

true + is hit
false + is false alarm
false - is miss
true - is correct rejection

Question 18

ROC curve

Answer 18

curve with the false alarm rate & hit rate
- d prime: no discrimination between stimulus and noise
- the more curved, the better the participant is