Ch10 Flashcards
Error tht occurs consistently in one direction such as a scale tht weighs everyone 4 pounds less tht can alter study results & must be minimized
Systematic measurement error
Lowest level of measurement when data can be organized into categories tht are exclusive & exhaustive bt the categories can’t be rank-ordered
Nominal scale measurements
Error tht is the difference between the measurement & true value of a variable tht is without a pattern
Random measurement error
Multiple item scale used to measure perceptions of a phenomenon in a study,such as a 20 item scale used to measure perception of pain wit ratings. 1- strongly disagree 4-strongly agree
Likert scale
Consistency of the measurement technique
Reliability
How well the instrument measures what it’s suppose to measure
Validity
Level of measurement wit categories tht can be rank-ordered such as level of functional status-poor function status,average or good
Ordinal scale measurement
Scale tht uses 100-mm line for a subject to mark, tht indicates the placement of his or her score.
Visual analog scale
Measurement of a concrete variable ie: blood pressure is involved in this type of measurement
Direct measurement
Measurement of an abstract idea (ie:anxiety) is involved
Indirect measurement
Questions posed orally to a study participant as a way of collecting data
Interview
Level of measurement with equal intervals bt without an absolute ZERO
Interval scaled measurement
Level of measurement wit equal intervals & an absolute zero point
Ratio-scale measurement
Difference between true measure vs actual measure
Measurement error
Measurement method requiring observation of specific elements in a situation
Structured observational measurement
Detailed plan of how study will be implemented tht is specific to the study being conducted & requires consideration of the commonplace elements of research
Data collection plan
The actual process of selecting subjects & gathering data from these subjects by the researchers.
Data collection
Form tht is developed or modified by the researcher which is used for recording data
Data collection form
Concerns or issues tht develop as data are collected & might include concerns with people,re-searchers,Institutions & events
Data collection problems
Accidental discovery of something useful or valuable during the conduct of a study
Serendipity
Use of the microcomputer to collect large amounts of data wit few errors tht can be readily analyzed wit a variety of statistical software packages
Computerized data collection
