"Design psychology experiment" Essays and Research Papers

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    Experimental Research Designs “A correlational study determines whether or not two variables are correlated. This means to study whether there is an increase or decrease in one variable corresponds to an increase or decrease in the other variable” (Cherry‚ 2012). In most correlation studies there is a relationship between both variables that had a change‚ while in others there wasn’t necessarily causation between the two (Cherry‚ 2012). An experimental design is one in which the researcher manipulates

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    Using Single- Subject Designs A Little History A major goal of psychology is to understand human and animal behaviour. Understanding a particular behaviour means knowing what variables influence the behaviour and what functional relationships exist between these variables and behaviours. Psychology’s beginnings as an experimental discipline began in the latter half of the 19th century. Early researchers recognized the problems created by apparently random variations in the behaviour of their

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    Causal Research Design: Experimentation Concept of Causality A statement such as "X causes Y " will have the following meaning to an ordinary person and to a scientist. ____________________________________________________ Ordinary Meaning Scientific Meaning ____________________________________________________ X is the only cause of Y. X is only one of a number of possible causes of Y. X must always lead to Y (X is a deterministic cause of Y). It is possible to prove that X is a cause of

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    of Salt Water Experiment Ex.3: For experiment 2‚ Complete steps (a)-(c) of the checklist. Experiment 2: Does the boiling point of water differ with different concentrations of salt? CheckList (a) Define the objectives of the experiment The purpose of this experiment is to determine the boiling point of water with different levels of concentration of salt. (b) Identify all sources of variation (i) Treatment factors and their levels The treatment factor in this experiment is salt water

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    Levels of Processing and memory The aim of the experiment is to investigate (a) whether level of processing (IV1) affects memory for words‚ (b) whether the intention to learn (IV2) has an effect upon memory and whether an effect of level of processing on memory for words is dependent upon intentionality of learning (IV1xIV2)‚ i.e. Is there an interaction effect? Levels of Processing is an influential theory of memory proposed by Craik and Lockhart (1972) which rejected the idea of the dual store

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    ADVANTAGES OF THE FACTORIAL DESIGN Some experiments are designed so that two or more treatments (independent variables) are explored simultaneously. Such experimental designs are referred to as factorial designs. In factorial designs‚ every level of each treatment is studied under the conditions of every level of all other treatments. Factorial designs can be arranged such that three‚ four‚ or n treatments or independent variables are studied simultaneously in the same experiment. If two independent variables

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    THE LOGIC OF EXPERIMENTAL DESIGN The randomized comparative experiment is one of the most important ideas in statistics. It is designed to allow us to draw cause-and-effect conclusions. Be sure you understand the logic: • Randomization produces groups of subjects that should be similar in all respects before we apply the treatments. • Comparative design ensures that influences other than the experimental treatments operate equally on all groups. • Therefore‚ differences in the response variable

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    FACTORIAL DESIGNS AND FACTORIAL NOTATION A factorial design‚ then‚ is one with more than one factor or independent variable. A complete factorial design is one in which all levels of each independent variable are paired with all levels of every other independent variable. An incomplete factorial design also has more than one independent variable‚ but all levels of each variable are not paired with all levels of every other variable. One advantage of using factorial designs is that they allow

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    Composite Design As PBD considers only main effects and ignores the interactions among the factors‚ therefore‚ a new design is required. Central composite design (CCD) is type of experimental design‚ which was first described by Box and Wilson (1951). Nowadays it is widely used in response surface methodology (RSM; discussed in the next section of the review) for building a second order (quadratic) model for the response variable without using a complete three-level factorial experiment. The design consists

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    Quasi-Experimental Research vs. True Experiments Unit 9 November 18‚ 2012 Introduction I will compare and contrast quasi-experimental research and true experiments by addressing their weaknesses and strengths. Throughout my project I will give a detailed description of my experimental method used‚ as well as a thorough justification of why I selected this method as well as my sampling plan. I will also identify the target population

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