BTM8106 Week 5 Complete Solution use as a guide
BTM8106 Week 5 Complete Solution use as a guide
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This 0 page Study Guide was uploaded by kimwood Notetaker on Thursday November 5, 2015. The Study Guide belongs to a course at a university taught by a professor in Fall. Since its upload, it has received 61 views.
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Date Created: 11/05/15
ANSWER 2 Quasi Experiments are kind of experiments which are performed similarly to the natural experiments but it is like impact of intervention on its target sample population Experiments are conducted upon real life situations Advantages 1 In these experiments it is easy to set up experimental designs when experiments are done which are irrational and unethical 2 It can easily be compared between the groups 3 This is a major advantage because it helps the researcher to make inferences about the possible existence of a cause and effect relationship of the treatment Disadvantages 1 They do not use random sampling they will select one particular group and do experiment of it 2 Groups upon which experiment is conducted is not similar basically they are non equivalent groups research is done So it increases the potential for low internal validity Weakness The biggest fundamental weakness of quasi experiment is it does not do random sampling experiments It is a weakness Because Without random assignment internal validity is reduced and causal claims become quite difficult to make Yes its weakness always matter at times it becomes a hindrance while performing and showing validity and reliability of result of research conducted Answer 3 Quasi experiments are basically not done in intact group it can also be done of individual who can be part of the group with selection test Though it is complicated process to find similar group Groups are equivalent at the beginning of the study To make equivalent at the end of the study the group members need to have common selection and choice for experiments need to takeoff ANSWER4 The biggest threat to the internal validity of these designs is selection ie the groups might be composed of different kinds of people with different characteristics such as group differences in age gender IQ reading ability etc Other threats are mortality and the selection interactions such as the selectionmaturation effect and the selectionhistory effect If the threat is there then treatment need to be delayed for the participants which are scattered For example a researcher might want to shape a participant s behavior or the researcher might want to increase the accuracy frequency or amount of a behavior over time ANSWER 5 a Nonequivalent control group pretest only Intact group is experiemented but two groups are not at all equal possibility to have susceptible to internal validity threat b Nonequivalent control group pretestposttest compares two nonequivalent groups of participants one group is observed measured after receiving a treatment and the other group is measured at the same time but receives no treatment Does not protect agains assignment bias c Crosssectional uses different groups of individuals each group representing a different age For example the different groups are measured at one point in time and then compared eg IQ in 30 40 50 and 60 years old d Regression Continuity Series of observations for each participant before a treatment and a series of observations after the treatment ANSWER 6 quasiexperimental designs used more often than experimental designs Just like in the quasi experimental designs there is no real manipulation of variables and In contrast to quasi experimental designs there is less rigor in control of extraneous variables ANSWER 7 the differential research design noneXDerimentaD simply compares preeXisting groups uses a participant characteristic such as gender race or personality to automatically assign participants to groups no random assignment of participants to groups dependent variable is then measured for each participant to obtain a set of scores Within each group the goal of the study is to determine Whether the scores for one group are consistently different from scores in another group e g mother s and father s involvement in the peer relationships of their adolescent children in differential research participant differences in one variable are used to create separate groups and measurements of the second variable are made Within each group correlational study treats all the participants as a single group and simply measures the two variables for each individual
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