Exam 9: Experimental Design

The null case is a situation in which treatments have no effect.

​Figure TB 9-5 -What type of design is shown in the accompanying figure?

​Figure TB 9-8 R 0 X 0 R 0 0 -What type of design is shown in the accompanying figure?

The simplest of all experimental designs is the two-group posttest-only randomized experiment.

Brice is interested in helping children learn to make healthier food choices.She has developed two interventions,a series of traditional worksheets and a series of game-based worksheets.The children will either complete the worksheets in school or at home.She plans to randomly assign students to the groups and her outcome measure is nutrition knowledge. 70. Brice is interested in helping children learn to make healthier food choices. She has developed two interventions, a series of traditional worksheets and a series of game-based worksheets. The children will either complete the worksheets in school or at home. She plans to randomly assign students to the groups and her outcome measure is nutrition knowledge. 1. Diagram Brice's factorial design. 2. Draw a graph that shows the null case for both experimental variables. 3. Draw a graph that shows a main effect for both independent variables but no interaction. 4. Draw a graph that shows an interaction.

​Figure TB 9-4 -What is illustrated in the accompanying figure?

A switching-replications design is good at defending against _______________ threats to internal validity.

The statement "If X then Y" is a statement of ____.

The blocks in the randomized block design are ____.

Blocking designs are classified as ____ designs.