As part of an experiment on the effects of behavior modeling, a set of raters are evaluating prosocial behavior in a series of videotapes of a preschool class. Initially, the raters were quite strict in their ratings, but after 3 hours of rating, their criteria had changed. Which type of threat to internal validity has occurred?

A. testing
B. attrition
C. maturation
D. history

Gettysburg address question. what is the best line from the address? why do you think so?

Agraduate student wants to examine the effect of print media versus televised media on individuals’ position on several social issues. the superintendent of a local work release facility, a family friend, will allow the graduate student access to the prison population to her quickly accrue subjects. the student’s irb should: approve this project since the risk appears to be no > minimal.not approve this project because the prisoners are merely a population of convenience for the student.approve this project since the superintendent is the ultimate authority on what happens in his facility.approve this project but submit it for federal review.

"martin luther king, jr. was buried the day after my first child was born, my daughter brooke. she was born april the eighth of 1968. i went from the hospital to the grave. and i spent three days thinking about what i was going to do with my life and decided that politics, although not perfect, was the best available nonviolent means of changing how we live. " - maynard jackson, 1990 which statement best explains how maynard jackson's 1968 decision foretold his future? question 8 options: he was elected mayor of atlanta in 1973 he was elected governor of georgia in 1990. he started his own bond and security business he removed segregation signs form water fountains at city hall