Ken develops a new scale to measure extraversion. In order to assess reliability, he divides his scale into even and odd numbered items and assesses the degree of correspondence between the two groups. Ken has used the technique.

Ken has used the Split - Half techniques

Explanation:

The split-half techniques is used to assess the internal consistency of a test.

it measures the extent to which all parts of the test contribute equally to what is being measured.  

This is done by comparing the results of one half of a test with the results from the other half. A test can be split in half in several ways.

This method of testing reliability  measures internal consistency i.e  how well the test components contribute to the construct that’s being measured. It is most commonly used for multiple choice test.

In relation to the above questions the action of Ken shows that he has used the split half techniques in order to assess the reliability of the test.

a. formula: f=ma or f/m=a

10,000n/1,267kg≈7.9m/

b. formula: a= and s=d/t

speed= 394.6/15

s=26.3m/s

a=

a=1.75m/

c. 7.9-1.75=difference of 6.15m/

d. the force that most likely caused this difference is friction forces