When does language development have its most rapid and important advances?

In a single-blind experiment, participants do not know if they are in an experimental group or a control group

Indicate whether this statement is true or false.

One difficulty of survey research is that people may not

answer questions with complete honesty, and thus may skew the results of the study. If people give different answers to a survey question that is asked on different occasions, this would be a particular problem for the critical thinking concept of _____. A) correlation versus causation B) replicability C) extraordinary claims D) falsifiability