Combining small pieces of information into larger clusters is known as:

Which of the following is NOT a drawback of longitudinal studies?

a) researchers always have a biased sample b) they are time consuming c) they are expensive d) participants may drop out over time

What is a technique that a researcher can use to avoid the observer bias effect when engaging in naturalistic observation?

a. Using matched observers b. Using blind observers c. Using counter-balanced observers d. Using random observers