## [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 FirstPresentation SecondPresentation ThirdPresentation 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?

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 &quot;remembers&quot; 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

?2 =

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