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[answered] A habituation task is often used to test memory for infants


A habituation task is often used to test memory for infants. In the habituation procedure, a stimulus is shown to the infant for a brief period, and the researcher records how much time the infant spends looking at the stimulus. This same process is repeated again and again. If the infant begins to lose interest in the stimulus (decreases the time looking at it), the researcher can conclude that the infant "remembers" the earlier presentations and is demonstrating habituation to an old familiar stimulus. Hypothetical data from a habituation experiment are as follows.

Amount of Time (In Sec.)
Attending to the Stimulus
Infant First
Presentation
Second
Presentation
Third
Presentation
A? 112? 81? 20?
B? 97? 35? 42?
C? 82? 58? 27?
D? 104? 70? 39?
E? 78? 51? 46?



(a) Use an ANOVA with???= 0.01 to determine whether there is a significant change in behavior for successive presentations. (Round your answers for?SS,?MS, and?F?to two decimal places.)

Source? SS df MS F
Between Treatments?
Within Treatments?
Between Subjects?
Error?
Total?


What is the critical?F?value? (Round your answer to two decimal places.)

Fcrit?=??


What do you conclude?

Reject the null hypothesis. There is a significant change in the mean amount of time spent looking as the same stimulus is repeatedly presented.Fail to reject the null hypothesis. There is a significant change in the mean amount of time spent looking as the same stimulus is repeatedly presented.Reject the null hypothesis. There is not a significant change in the mean amount of time spent looking as the same stimulus is repeatedly presented.Fail to reject the null hypothesis. There is not a significant change in the mean amount of time spent looking as the same stimulus is repeatedly presented.


(b) Compute??2?to measure the effect size for these data. (Round your answer to three decimal places.)

?2?=


A habituation task is often used to test memory for infants. In the

 

habituation procedure, a stimulus is shown to the infant for a

 

brief period, and the researcher records how much time the infant

 

spends looking at the stimulus. This same process is repeated

 

again and again. If the infant begins to lose interest in the

 

stimulus (decreases the time looking at it), the researcher can

 

conclude that the infant "remembers" the earlier presentations

 

and is demonstrating habituation to an old familiar stimulus.

 

Hypothetical data from a habituation experiment are as follows. Amoun

 

Attend

 

Infant First

 

Presentation A 112 B 97 C 82 D 104 E 78 Pr (a) Use an ANOVA with ? = 0.01 to determine whether there is a

 

significant change in behavior for successive presentations.

 

(Round your answers for SS, MS, and F to two decimal places.)

 

Source

 

Between

 

Treatments

 

Within Treatments

 

Between Subjects

 

Error

 

Total SS df MS F What is the critical F value? (Round your answer to two decimal

 

places.)

 

Fcrit =

 

What do you conclude?

 

Reject the null hypothesis. There is a significant change in the

 

mean amount of time spent looking as the same stimulus is

 

repeatedly presented.

 

Fail to reject the null hypothesis. There is a significant change in

 

the mean amount of time spent looking as the same stimulus is

 

repeatedly presented.

 

Reject the null hypothesis. There is not a significant change in the

 

mean amount of time spent looking as the same stimulus is

 

repeatedly presented.

 

Fail to reject the null hypothesis. There is not a significant change

 

in the mean amount of time spent looking as the same stimulus

 

is repeatedly presented.

 

(b) Compute ?2 to measure the effect size for these data. (Round

 

your answer to three decimal places.)

 

?2 =

 


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