Sometimes It Is Difficult If Not Impossible to Find a Control

question 48

Multiple Choice

Sometimes it is difficult if not impossible to find a control group that is sufficiently comparable to an experimental group to allow for a traditional two-group experimental design. In these cases, one may want to use a time-series design

• A) which is a quasi-experimental design involving multiple measures of the dependent variable on a single group, both before and after treatment.
• B) which is a strong experimental design involving multiple measures of the dependent variable on a single group, both before and after treatment.
• C) which is an experimental design using multiple dependent measures on the experimental group, then taking measures on control participants over time, as he or she can find them.
• D) staggers the time of presentation of the independent variable across participants.

---

Definitions:

Myofilaments

The filaments of myofibrils, constructed from proteins, primarily actin, and myosin, which are essential for muscle contraction.

I Bands

I Bands are the light-appearing regions of a sarcomere in muscle fibers, reflecting areas where thin filaments do not overlap with thick filaments.

Z Lines

The boundaries in a striated muscle fiber that separate one sarcomere from the next, crucial for muscle contraction.

H Zone

The H Zone is a region within the sarcomere of a muscle fiber that appears lighter under a microscope and shortens during muscle contraction, it is found in the center of the A band.