Final answer:
The main forms of bias we are concerned with in intervention studies include cognitive bias, confirmation bias, observer bias, experimenter bias, and response bias.
Step-by-step explanation:
The main forms of bias we are concerned with in intervention studies include cognitive bias, confirmation bias, observer bias, experimenter bias, and response bias. Cognitive bias refers to how individuals' thinking patterns affect how they take in and process new information. Confirmation bias is the tendency to seek out and accept information that supports existing beliefs. Observer bias occurs when observers unconsciously skew their observations to fit their research goals or expectations. Experimenter bias is the possibility that a researcher's expectations might skew the results of the study. Response bias occurs when respondents give the answer they think they should give, rather than their true feelings or beliefs.