Cronbach's Aplha and Kuder Richardson 20 are statistical tests that will determine the validity of teh research isntrument

Cronbach's Alpha and Kuder Richardson 20 are indeed statistical tests, but they are used to measure the reliability or internal consistency of a test, not its validity.

Here's a step-by-step explanation:

1. Cronbach's Alpha: This is a measure of internal consistency, that is, how closely related a set of items are as a group. It is considered to be a measure of scale reliability. A high value of Cronbach's Alpha (close to 1) indicates good internal consistency.

2. Kuder Richardson 20 (KR20): This is a special case of Cronbach's Alpha. It is used when your test items are scored either right or wrong (dichotomous). Like Cronbach's Alpha, a high value of KR20 (close to 1) indicates good internal consistency.

3. Validity: This is a different concept. It refers to how well a test measures what it is supposed to measure. While Cronbach's Alpha and KR20 can give you information about the reliability of your test (i.e., the consistency of your test results), they cannot tell you anything about its validity (i.e., whether it is measuring what it is supposed to measure).

So, while Cronbach's Alpha and KR20 are important tools in research, they do not determine the validity of a research instrument.