When the Change from Pretest to Posttest Is Due Not

question 22

Short Answer

When the change from pretest to posttest is due not to your program but rather to a change in the way you measured the outcome,there is a(n)_______________ threat to internal validity.

---

Definitions:

Photolysis

The decomposition or separation of molecules by the action of light, often referring to the process in photosynthesis where water molecules are split.

Photosystem I

A component of the photosynthesis process that captures light energy and uses it to transfer electrons, ultimately generating ATP and NADPH.

C4 Plants

Plants that utilize the C4 carbon fixation pathway, enhancing their ability to photosynthesize under conditions of drought, high temperatures, and limitations of nitrogen or CO₂.

Four-Carbon Compounds

Organic compounds that contain exactly four carbon atoms, playing various vital roles in biological processes and industrial applications.