sample+key[1] - 1. If a researcher uses a within-subjects...

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1. If a researcher uses a within-subjects experimental design and exposes each participant to all levels of the independent variable, then the researcher is most likely to choose which one of the following techniques to further ensure that changes in the dependent variable can be attributed to changes in the independent variable ? a. comparison to control group no, b/c within subjects design (control is baseline); yes if it were a between subjects' design b. between-groups matching no, this is, again, more appropriate for a between subjects' design; fyi, matching is typically a technique used in place of random assignment when the latter is not possible c. comparison to baseline yes, baseline score on the DV are gathered prior to administration or manipulation of the IV; therefore, it is as close to a "control group" as you're going to get d. within-groups matching no, there is no such thing; not even possible
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2. One characteristic of an experiment that distinguishes it from a quasi-experiment is: a. Random sampling no, random sampling would refer to the method by which *all* participants are selected, prior to the assignment to groups; also, random sampling is implicitly assumed in most research designs b. Random assignment yes, the only difference between the two designs is the method by which study participants are assigned to groups (i.e., experimental versus control) in that only in a true experiment are participants randomly assigned to groups. c. Ability to infer causality While it is presumed that an experiment hosts a higher level of control over extraneous variables than a quasi-experiment (primary due to random assignment to groups), the independent variable is being manipulated and selectively administered to a subset of the sample. Because manipulation of IV is the main criteria for inferring causality, both types of designs boast of this feature. d. The level of statistical control Statistical control refers to post-experimental analytical procedures, are largely unrelated to the research design used to collect the data and, therefore, can be applied to both design. 3. Speed in impulse transmission across neurons is increased when neural impulses are able to skip across non-myelinated portions of the axon. These skipped portions are referred to as ________ . a. Glial cells No, these compose the myelin sheath b. Axon Sheaths No, I don't think this term exists c. Axon terminals No, the axon terminals are only a small portion of the axon; besides, this is mostly where chemical, interneuron communication occurs. d. Nodes of Ranvier yes, these are the "gaps" located between myelinated portions of the axon. 4. An
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This note was uploaded on 04/24/2008 for the course PSYC 1101 taught by Professor Leader during the Spring '07 term at Georgia Institute of Technology.

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sample+key[1] - 1. If a researcher uses a within-subjects...

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