controlled experiment - involves an experimental investigation of the relationship between one or more IVs and a DV; all other variables are controlled., population - the wider groups of people that a study is investigation, sample - the smaller group of people selected from the population who will be participants in the investigation, random sampling - selecting participants from the population in a way that means each member of the population has an equal chance of being selected to participate in the study, stratified sampling - first dividing the population into subgroups, and then randomly selecting participants from each subgroup in the proportion that they appear in the population, random allocation - dividing a sample into groups in such a way that each participant has an equal chance of being placed into the experimental group or the control group, experimental group - the group that is exposed to the IV and receives the experimental treatment, control group - the group that forms a baseline level to compare the experimental group with, between-subjects design - an investigation design in which participants are randomly allocated to either the control or the experimental group; different participants in each group, within-subjects design - an investigation design in which all participants in the sample are involved in both the experimental and control conditions, mixed design - an investigation design that combines elements of a between-subjects design and a within-subjects design, case study - an investigation of a particular activity, behaviour, event, or problem that contains a real or hypothetical situation and includes real-world complexities, classification and identification - a type of investigation that involves arranging phenomena, objects or events into manageable sets, and recognising phenomena as belonging to a particular set or part of a new or unique set, correlational study - An investigation that involves planned observation and recording of events and behaviours that have not been manipulated or controlled to understand the relationships or associations existing between variables, to identify which factors may be of greater importance, and to make predictions, fieldwork - a type of investigation that involves collecting information through observing and interacting with a selected environment, literature review - a type of investigation that involves collating and analysing secondary data findings and viewpoints, modelling - a type of investigation in which a physical or conceptual model is constructed and/or manipulated to simulate a system, simulation - a type of investigation that uses a model to replicate and study the behaviour of a system, product/process/system development - a type of investigation in which a product, a process or a system is designed to meet a human need,

Investigation Methodologies

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