| Automatic data collection equipment |
hardware and/or software for automatic collection of usability test data. Examples of such data collection include screen capture and video, audio, and keystroke recording, often with time stamping.
|
| Configuration |
the specific collection of hardware and software, including model and version numbers, that constitutes the computing environment on which the product was tested. The configuration includes the platform. |
| Consumer |
the organization considering the purchase of the product. |
| Debriefing |
a posttest interview with a participant. |
| Experimental design |
a plan for assigning experimental conditions to participants and the statistical analysis associated with the plan. Typically, this includes a specification of the independent variables, dependent variables, number of participants and sampling strategy, procedure for assigning participants to experimental conditions, and order in which test tasks are given. |
| Face validity |
the apparent validity of an instrument, as determined by an observation-based review. |
| Independent variable |
a variable manipulated by the tester to set up the test conditions. (Contrast with the dependent variable, which is a variable that is being measured by the study.) |
| Likert scale |
a rating scale designed to measure user attitudes or reactions by quantifying subjective information. It typically contains a set of favorable and unfavorable statements about the product, to which a respondent indicates his or her level of agreement or disagreement. A Likert questionnaire may have an odd or even number of points, is often numerically numbered, and typically has at least two anchors describing the extremes of the scale dimension.
Example: This product was easy to use.
Strongly disagree |
Somewhat disagree |
Slightly disagree |
Neutral |
Slightly agree |
Somewhat agree |
Strongly agree |
I felt frustrated while using this product.
Strongly disagree |
Somewhat disagree |
Slightly disagree |
Neutral |
Slightly agree |
Somewhat agree |
Strongly agree |
|
| Mean |
the arithmetic ‘average’ of a set of quantities. Specifically, the sum of the quantities divided by the number of quantities in the set. |
| Nondisclosure agreement |
an agreement between the supplier and the consumer, in which they recognize that their cooperation requires them to divulge some of their proprietary information to each other, and in which each agrees not to disclose any of the other’s proprietary information to anyone else. |
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