Glossary Items Starting with "L"
- Laboratory Animal
Care Committee
- A formalized committee that reviews every research proposal
that involves animals for ethical issues. Every research center
that conducts animal research must have a local Laboratory
Animal Care Committee.
- Latin square design
- A procedure used to provide a measure of
counterbalancing in a within-subjects design. Instead
of using all possible orders of presentation, as in complete
counterbalancing, a Latin square design uses a set of orders
that ensures that every experimental condition appears equally
often in every position.
- levels of constraint
- Degree of systematic control applied in research. The labels
assigned to these levels of constraint are
naturalistic,
case-study,
correlational,
differential, and
experimental.
- levels of headings
- The mechanism used in published research articles for
organizing the report. Levels of headings are similar to an
outline, with the various sections and subsections of the report
representing different levels of the outline.
- Likert-scale items
- In Likert scales, each item is presented on a continuum. For
example, the scale may range from "strongly agree" to "strongly
disagree."
- linear relationship
- Relationship between two or more variables that, when
plotted in a standard coordinate system, tend to cluster around
a straight line. Most correlation coefficients are sensitive
only to linear relationships between variables.
- list server
- A mechanism that permits continuous electronic conversations
between people who may be spread all over the world. Electronic
mail messages sent to a list server are distributed to everyone
on a distribution list, allowing the easy exchange of ideas
among large groups of people.
-
-
- logic
- Set of operations that can be applied to statements and
conclusions drawn from those statements to determine the
internal accuracy of the conclusions.
- longitudinal (panel)
design
- A research design used in developmental psychology in which
a group of participants is followed over time, with the
dependent measures repeated during follow-up testing. This
design is often contrasted with
cross-sectional designs.
- longitudinal research
- Research in which a longitudinal research design is used.