Reliability and Validity

Write: In your initial post of at least 550 words, review Exercise 4 and then complete the following:

Discuss which researcher’s operational measure has high validity and high reliability? Please explain your response.
Discuss which researcher’s operational measure has high validity and low reliability? Please explain your response.
Discuss which researcher’s operational measure has low validity and high reliability? Please explain your response.
Discuss which researcher’s operational measure has low validity and low reliability? Please explain your response.