Which type of research study would best be used to study the factors that shaped a notorious killer?
Grounded theory was used to study the lives 3 serial killers.
What is the most important aspect of a hypothesis?
The two primary features of a scientific hypothesis are falsifiability and testability, which are reflected in an “If…then” statement summarizing the idea and in the ability to be supported or refuted through observation and experimentation.
What is the correct term for a pattern of variation that is noted in a given data set?
Variability (also called spread or dispersion) refers to how spread out a set of data is. Variability gives you a way to describe how much data sets vary and allows you to use statistics to compare your data to other sets of data.Feb 10, 2022
Which type of research involves studying the same group of individuals over time?
longitudinal studyA longitudinal study can be used to discover relationships between variables that are not related to various background variables. This observational research technique involves studying the same group of individuals over an extended period.May 2, 2020
What is hypothesis in research methodology?
A hypothesis is a statement that introduces a research question and proposes an expected result. It is an integral part of the scientific method that forms the basis of scientific experiments.Nov 30, 2021
Why is hypothesis important in research?
Importance of Hypothesis: It helps to provide link to the underlying theory and specific research question. It helps in data analysis and measure the validity and reliability of the research. It provides a basis or evidence to prove the validity of the research.Apr 21, 2020
What is the other term for variability?
Synonyms & Near Synonyms for variability. changeability, flexibility, mutability, variableness.
Which of the following is the correct definition of psychology?
Psychology is the study of the mind and behavior, according to the American Psychological Association. It is the study of the mind, how it works, and how it affects behavior.
How do you describe the variability of a distribution?
Variability tells you how far apart points lie from each other and from the center of a distribution or a data set. Variability is also referred to as spread, scatter or dispersion.Sep 7, 2020
What research studies the same group of participants?
In a longitudinal study, researchers repeatedly examine the same individuals to detect any changes that might occur over a period of time. Longitudinal studies are a type of correlational research in which researchers observe and collect data on a number of variables without trying to influence those variables.May 8, 2020
What type of research method involves studying the same group of individuals who are all the same for many years and regular intervals?
A longitudinal study, like a cross-sectional one, is observational. So, once again, researchers do not interfere with their subjects. However, in a longitudinal study, researchers conduct several observations of the same subjects over a period of time, sometimes lasting many years.
What research studies people of different ages at the same time?
cross-sectional studyThink of a cross-sectional study as a snapshot of a particular group of people at a given point in time. Unlike longitudinal studies, which look at a group of people over an extended period, cross-sectional studies are used to describe what is happening at the present moment.Oct 10, 2019
What is the literal meaning of psychology?
methods. The literal meaning of the word "psychology" is the. study of the mind. Malcolm works for a major pharmaceutical company and is in charge of designing a clinical protocol to study depression. The new medication under investigation has the potential to alleviate the symptoms of depression. Malcolm needs to describe how depression as well as ...
What does a correlation coefficient mean?
The value of a correlation coefficient reflects the. the strength of the relationship between two variables. If a study finds that there is a negative correlation between exercise and blood pressure, this would most likely indicate that. people who exercise more tend to have a lower blood pressure.
What is the purpose of a between subject design?
In the latter, a between-subjects design is invoked to measure the impact of the independent variable on different groups of subjects. What remains common to both types of quasi-experiments is the fact that investigators do not ...
What is a quasi experiment?
A quasi-experiment allows an investigator to assign treatment conditions to subjects and measure particular outcomes, but the researcher either does not or cannot assign subjects randomly to those conditions. To be clear, in pseudo-experimental design, the study lacks a control condition, whereas in quasi-experimental design, ...
What is differential attrition?
Most widely recognized is that differential attrition may occur, with more (or different kinds of) participants dropping out of one group than another. As noted earlier, Cook and Campbell also suggested that threats such as resentful demoralization may apply in a randomized experiment.
What is experimental group?
The experimental group is the group exposed to the treatment condition, while the control group is not subjected to treatment .
What is expression data?
Expression data are often organized into studies. For Gene Logic data, studies are used to group data that address specific questions about the effects of certain variables (such as treatment conditions, disease stage, time, and so on) on gene expression levels.
What is a randomized clinical trial?
In research on the effectiveness of psychotherapies and. medical treatments, this type of experiment is often called a randomized clinical trial. In a no-treatment control condition, participants receive no treatment whatsoever. One problem with this approach, however, is the existence of placebo effects. A placebo is.
What are the disadvantages of within-subjects design?
The primary disadvantage of within-subjects designs is that they can result in carryover effects. A carryover effect. is an effect of being tested in one condition on participants' behavior in later conditions.
What is the purpose of an experiment?
The purpose of an experiment, however, is to show that two variables are statistically related and to do so. in a way that supports the conclusion that the independent variable caused any observed differences in the dependent variable.
Why do researchers try to control extraneous variables?
Thus, one reason researchers try to control extraneous variables is so their data look more like the idealized data, which makes the effect of the independent. variable is easier to detect. Still, in many situations, the. advantages of a diverse sample outweigh the reduction in noise achieved by a homogeneous one.
What is an empirical study?
An empirical study is high in external validity if the way. it was conducted supports generalizing the results to people and situations beyond those actually studied. As a. general rule, studies are higher in external validity when the participants and the situation studied are similar to.
How can extraneous variables make it difficult to detect the effect of the independent variable?
The second way that extraneous variables can make it difficult to detect the effect of the independent variable is by becoming confounding variables. A confounding variable is an extraneous variable that differs on average across levels of the independent variable.
What is random assignment?
Random assignment is a method for assigning participants in a sample to the different conditions, and it is an important element of all .
Most recent answer
A "within subjects" design has one group of subjects that participates in all the conditions. The data analysis compares the data of each subject to within his/her own responses. In effect, each subject serves as their own control. See "The Design of Experiments" by Roland Fisher.
Similar questions and discussions
I'm working on a research design which has 1 independent variable (price format) with 3 levels, and 1 moderator (product type) with 3 levels, and the effects will be measured with 1 dependent variable (purchase intention).
What is statistical control?
Statistically Control for Variables that Can’t be Experimentally Controlled. In analyzing your study results, you can make a statistical adjustment that will account for the influence of a specified third variable and allow you to analyze the results with the influence of that third variable eliminated.
What is experimental design?
Experimental designs allow researchers to fully control the independent variable so as to create a situation where the independent variable is the only explanation for any observed change in the dependent variable. Determination of Causality.
What is the Hawthorne effect?
The Hawthorne Effect. The Hawthorne effect, or observer effect, acknowledges that the act of observation can alter the behavior being observed. Participants’ expectations, which are an unavoidable part of the research process, may sometimes drive effects in unanticipated ways. Demand Characteristics.
What is random assignment?
Random assignment is the procedure by which researchers place participants in different experimental groups using chance procedures. Random assignment usually is effective at equalizing the many other factors that the experimental and control group might differ on besides the experimental assignment to groups.
