Materials most interesting and Most challenging?

As we approach the midpoint in this course “Research Methods for the Criminal Justice Professional” share your thoughts on your learning experience in this course so far. In the topics covered below so far, what material have you found most interesting? Most challenging? 

1. Foundation of Criminological Research

2. Research Ethics, conceptualization and Measurement

3. Sampling, Causation, and research Design

4. Experiment Designs and Survey Research

350-450 words excluding references, APA format and a minimum of three references