Which of the following brain structures is involved in generating and monitoring arousal?
Midbrain and Hindbrain Structures The reticular formation is centered in the midbrain, but it actually extends up into the forebrain and down into the hindbrain. The reticular formation is important in regulating the sleep/wake cycle, arousal, alertness, and motor activity.
When a test has the ability to measure what it is intended to measure it is said to be?
Content validity is an important research methodology term that refers to how well a test measures the behavior for which it is intended. If the test does indeed measure this, then it is said to have content validity — it measures what it is supposed to measure.
What is a good internal consistency?
Internal consistency ranges between zero and one. A commonly-accepted rule of thumb is that an α of 0.6-0.7 indicates acceptable reliability, and 0.8 or higher indicates good reliability. High reliabilities (0.95 or higher) are not necessarily desirable, as this indicates that the items may be entirely redundant.
What is a common measure of internal consistency?
Perhaps the most common measure of internal consistency used by researchers in psychology is a statistic called Cronbach’s α (the Greek letter alpha). Conceptually, α is the mean of all possible split-half correlations for a set of items. For example, there are 252 ways to split a set of 10 items into two sets of five.
What are the three types of reliability?
Reliability refers to the consistency of a measure. Psychologists consider three types of consistency: over time (test-retest reliability), across items (internal consistency), and across different researchers (inter-rater reliability).
What is the basic measure of reliability?
Reliability tells you how consistently a method measures something. When you apply the same method to the same sample under the same conditions, you should get the same results. If not, the method of measurement may be unreliable. There are four main types of reliability.
How do you know if an experiment is reliable?
A measurement is reliable if you repeat it and get the same or a similar answer over and over again, and an experiment is reliable if it gives the same result when you repeat the entire experiment.
What does it mean if something is reliable?
Someone or something that is reliable can be trusted or believed because he, she, or it works or behaves well in the way you expect: Is your watch reliable? reliable information. Gideon is very reliable – if he says he’ll do something, he’ll do it.
What is reliability in quantitative research?
The second measure of quality in a quantitative study is reliability, or the accuracy of an instrument. In other words, the extent to which a research instrument consistently has the same results if it is used in the same situation on repeated occasions.
Why is quantitative research is reliable?
Pertinent in later stages of research: Quantitative research is usually recommended in later stages of research because it produces more reliable results. Consistent with data: With quantitative research, you may be getting data that is precise, reliable and consistent, quantitative and numerical.
What are validity and reliability in quantitative research?
3 Predictive validity—means that the instrument should have high correlations with future criterions. 2 For example, a score of high self-efficacy related to performing a task should predict the likelihood a participant completing the task. Reliability relates to the consistency of a measure.
What is rigor in quantitative research?
Abstract. Methodological rigor in quantitative research refers to the soundness or precision of a study in terms of planning, data collection, analysis, and reporting.
How do you maintain rigor in quantitative research?
Rigor is best achieved through thoughtful and deliberate planning, diligent and ongoing application of researcher reflexivity, and honest communication between the researcher and the audience regarding the study and its results.