Researchers randomly divide 100 people into two groups, each of which have 50 subjects. the group is given pills that contain a very high amount of thiamin. the control group is given similar tasting and appearing pills that do not contain thiamin.

treatment                                                  

Explanation:

Treatment group: In psychological research, the term treatment group is defined as a particular set of participants in an experiment that are vulnerable to any sort of manipulation or changes made by the experimenter in the independent variable. It is considered as an integral or important part of particular research that is responsible for helping in the measurement of effects and establishes causality.

In the question above, the given statement signifies the treatment group.

answer: intercourse

hope this

answer; overt behavior;