Chapter 10: Claryifing Measurement And Data Collection Flashcards
Is the process of assigning numbers or values to concepts, objects, events, or situations using a set of rules.
Measurement
Involves determining the value of concrete things, such as oxygen saturation, temperature, blood pressure weight, demographic variables
Direct measures
indicator of concepts; of abstract concepts such as pain, depression, coping, self-care, and self-esteem, anxiety level, feelings
Indirect measures (indicator)
is concerned with how consistently the measurement technique measures the concept of interest
Example- if you are using a multiple item scale to measure depression, the scale should indicate similar depression scores each time an individual completes it within a short period of time.
Reliability
The _______ of an instrument is a determination of how well the instrument reflects the abstract concept being examined.
Validity
If expressed as a correlation coefficient (ꭇ), ___is perfect reliability, whereas _____ is no reliability.
1.00 ; 0.00
The lowest acceptable coefficient for a well-developed measurement tool is ________
0.80
An accurate identification of the presence of a disease
True positive
Indicates a disease is present when it is not
False positive
Indicates a disease is not present when it is
False negative
Which indicates accurately that a disease is not present
True negative
is the proportion of patients with the disease who have a positive test result or true positive rate
____________ calculation = probability of disease =
a/(a+c) x100% = true-positive rate
Sensitivity
is the proportion of patients without the disease who have a negative test result, or true- negative rate.
___________ calculation = probability of no disease = d/(b+ d) x 100% = true-negative rate
Specifically
Data collection method that involves interaction between the study participants and observer (s) in which the observer has the opportunity to watch the participant perform in a specific setting
Observational measurement
Type of observational measurement that involves spontaneous observing and recording what is seen in words
Unstructured observational measurement
Type of observational measurement that the researcher carefully defines what s/he will observe and how the observations are to be made, recorded, and coded as numbers
Structured observational measurement
Data collection method that involves verbal communication between the researcher and the study participant during which information is provided to the researcher
Interview
Type of interview that is controlled by the study participant
Unstructured
Type of interview in which the content is similar to that of a questionnaire, with the possible responses to questions and enter carefully designed by the researcher
Structured
Data collection method of self report form designed to elicit information through written , verbal, or electronic responses of the study participant.
Questionnaires
Type of data collecting method that involves soliciting perceptions of participants assembled as a group; facilitator guides discussion and creates a non threatening environment (qualitative)
Focus groups
a form of self report, is a more precise means of measuring phenomena than a questionnaire.
Scales
What are the types of scales
- Rating scales
- Likert scale
- Visual analog scale
Type of scale that are the crudest form of measurement involving scaling technique (pain scale 1-10)
Rating scales
What scale is designed to determine the opinions or attitudes of subjects. Contains a number of declarative statements.
Ex. Strongly disagree, disagree, neutral, agree, strongly agree.
Likert scales
Type of scale used to measure strength, magnitude, or intensity of individuals subjective feelings, sensations, or attitudes about symptoms or situations….
Example: no pain -> worst pain imaginable
Visual analog scale VAS
What are the levels of measurement
- Nominal
- Ordinal
- Interval
- Ratio
What level of measurement is the lowest of the four measurement categories used when data can be organized into categories of a defined property but the categories cannot be ranked-ordered.
Ex. Nationality, gender, race, ethnicity, marital status, and diagnosis (hypertension).
Nominal
What level of measurement is data that can be assigned to categories that can be ranked
Example: intensity of pain,
Ex. Level of conflict (low of high)
Ordinal
What level of measurement uses scales, which have equal numerical distances between the intervals. The categories must have equal intervals between them
Ex. Temperature in degrees Fahrenheit changes in temperature can be measured precisely example 70 degrees and 60 degrees has 10 degrees between them.
Interval
What level of measurement is the highest form of measurement and meets all the rules of the forms of measurement: mutually exclusive categories, exhaustive categories, ordered ranks, equally spaced intervals, and a continuum of values Rule: the data must have absolute 0
Ex. Group size (5). Weight, length, and volume.,
Ratio