Question

1. Trace your hand on a piece of paper. Now, measure the length of your middle...

1. Trace your hand on a piece of paper.

Now, measure the length of your middle finger.

Let's say I use length of middle finger as a measure of intelligence.

Would this be a reliable measure of intelligence for adults?

2. I am still using middle finger length as a measure of intelligence.

Would this be a valid measure of intelligence for adults?

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Answer #1

1.A test is said to be reliable if it gives consistent results while measuring the same construct under the same conditions.So, if the length of the middle finger is used to measure intelligence, the measurment would be consistent, as finger length remain the same for adults.

So Yes,it would be a reliable measure of intelligence for adults.

2.Validity is the extent to which a test measures what it claims to measure.If we consider face validity the test does not seem valid. The length of the middle finger is not known to have any association with Intelligence as a construct.

Hence, this would not be a valid measure of intelligence for adults.

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