MODULE #3 Flashcards
Are qualities, properties or characteristics of persons, things or situations may change or vary, manipulated, measured or controlled
Variables
is a procedure for assigning numerical values to represent the amount of an attribute present in an object or person
Measurement
Advantages of measurement
• It removes subjectivity and guesswork
• Obtain reasonably precise information
• It serves as a language of communication
determine the type of statistical analysis that can be used and the type of conclusions that can be drawn from the investigation
Levels of Measurement
Are used to classify variables into categories but cannot be ranked, categories are mutually exclusive
Nominal
Are used to show relative rankings of variables, and
in ordering observations according to magnitude or intensity, from most to least; highest to lowest
Ordinal
Example of ordinal
• likert scale
• semantic differential scale
• vignettes
• q sort
• visual analog scale
Consist of several declarative items that express a viewpoint on a topic. Respondents typically are asked to indicate the degree to which they agree or disagree with the opinion expressed by the statement
Likert scale
Participants are asked to rate concepts on a series of bipolar adjectives. Respondents place a check at appropriate point on a seven point scale that expands from one extreme of the dimension to the other.
Semantic differential scale
Brief case reports or descriptions of events to which respondents are asked to react. Descriptions are structured to elicit information about respondents perceptions of some phenomenon or their projected actions
Vignettes
Participants are presented with a set of cards on which words or phrases are written, they are told to sort the cards along a specified bipolar dimension. Typically, There are between 50 to 100 cards to be sorted into nine or eleven piles
Q sorts
Use to measure subjective experiences
Visual Analog Scale
A scale in which respondents are asked to rate something along an ordered, numbered continuum, typically on a bipolar dimension
Graphic rating scale
Rankings of variables on a scale with equal intervals between the numbers, consist of real numbers. The zero point remains arbitrary and not absolute
Interval
Rankings of variables on scales with equal intervals, Distance between ranks is specified up to the 0 point level, the zero is absolute
Ratio