The center value of a scale with an odd number of response possibilities. Example on a scale of agreement is "neither agree or disagree."

A point or value that marks one end of a line segment or interval.

longer-scale formats reduce skew and

provide a more normal distribution of scores

Providing clear examples of the endpoints, ones that are meaningful

for your participants, can also be helpful

careful examination of the data, pilot testing, and sensitivity to group differences will help you

be sensitive to different subject populations (especially those from different cultures)

The sum of responses to multiple questions intended to measure the same variable using the Likert response format.

Evaluating Your Survey

Obtain Feedback, Conduct Pilot Testing, Assess Instrument Reliability, Test-retest Reliability, Parallel-forms Reliability

Test-retest Reliability

A measure of survey reliability that examines the consistency of responses of respondents who complete the same survey on two separate occasions.

A “prestudy" conducted before your actual study to assess your survey/interview instrument or test a methodology.

experts look at if the questions measure what they are supposed to measure (external validity) and whether subsets of questions sensibly group together as coherent scales (internal validity)

the piloting process may involve conducting interviews and

asking open-ended questions to develop the more tightly worded items

Parallel-forms (or alternate-forms) reliability

A measure of survey reliability that examines the consistency of responses of respondents across two versions of a survey

participants may remember how they responded the first time,

potentially leading to overestimates of reliability

extent that items intended to measure the same variable yield similar responses.

Split-half reliability: A measure of internal consistency assessed by dividing survey items intended to measure

the same variable into two sets and examining how well responses to those two sets of items agree with one another

A measure of the internal consistency of a set of scale items.

Distinct parts of a larger Instrument that measure different aspects of a variable

Factor analysis: examines the relationships between

items in a scale, useful for determining whether a scale measures a single or multiple variables

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Term	Definition
Midpoint	The center value of a scale with an odd number of response possibilities. Example on a scale of agreement is "neither agree or disagree."
Anchor (or endpoint)	A point or value that marks one end of a line segment or interval.
longer-scale formats reduce skew and	provide a more normal distribution of scores
Providing clear examples of the endpoints, ones that are meaningful	for your participants, can also be helpful
careful examination of the data, pilot testing, and sensitivity to group differences will help you	be sensitive to different subject populations (especially those from different cultures)
Likert scale	The sum of responses to multiple questions intended to measure the same variable using the Likert response format.
Evaluating Your Survey	Obtain Feedback, Conduct Pilot Testing, Assess Instrument Reliability, Test-retest Reliability, Parallel-forms Reliability
Test-retest Reliability	A measure of survey reliability that examines the consistency of responses of respondents who complete the same survey on two separate occasions.
Pilot study	A “prestudy" conducted before your actual study to assess your survey/interview instrument or test a methodology.
Obtain Feedback	experts look at if the questions measure what they are supposed to measure (external validity) and whether subsets of questions sensibly group together as coherent scales (internal validity)
the piloting process may involve conducting interviews and	asking open-ended questions to develop the more tightly worded items
Parallel-forms (or alternate-forms) reliability	A measure of survey reliability that examines the consistency of responses of respondents across two versions of a survey
participants may remember how they responded the first time,	potentially leading to overestimates of reliability
Internal consistency	extent that items intended to measure the same variable yield similar responses.
Split-half reliability: A measure of internal consistency assessed by dividing survey items intended to measure	the same variable into two sets and examining how well responses to those two sets of items agree with one another
Cronbach's alpha	A measure of the internal consistency of a set of scale items.
Subscales	Distinct parts of a larger Instrument that measure different aspects of a variable
Use Factor Analysis for	Advanced Scale Construction
Factor analysis: examines the relationships between	items in a scale, useful for determining whether a scale measures a single or multiple variables

Created by: james22222222

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