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This general definition of measurement is consistent with measurement in psychology too. (Psychological measurement is often referred to as psychometrics.) Imagine, for example, that a cognitive psychologist wants to measure a person’s working memory capacity—his or her ability to hold in mind and think about several pieces of information ...
- Paul C. Price, Rajiv S. Jhangiani, I-Chant A. Chiang, Dana C. Leighton, Carrie Cuttler
- 2015
Figure 2. The scientific method is a process for gathering data and processing information. It provides well-defined steps to standardize how scientific knowledge is gathered through a logical, rational problem-solving method. Scientific knowledge is advanced through a process known as the scientific method.
In psychology, the intelligence quotient (IQ) is often considered to be measured at the interval level. Finally, the ratio level of measurement involves assigning scores in such a way that there is a true zero point that represents the complete absence of the quantity. Height measured in meters and weight measured in kilograms are good examples.
Psychology was therefore declared a ‘soft science’ that can never achieve the status of the ‘hard sciences’ (e.g., physics, chemistry). This categorisation implies the belief that some sciences have only minor capacities to accumulate secured knowledge and lower abilities to reach theoretical and methodological consensus (Fanelli and Glänzel 2013 ; Simonton 2015 ).
Dec 14, 2023 · Reliability in psychology research refers to the reproducibility or consistency of measurements. Specifically, it is the degree to which a measurement instrument or procedure yields the same results on repeated trials. A measure is considered reliable if it produces consistent scores across different instances when the underlying thing being measured has not changed.
A collection of measurements or observations. datum. A single measurement or observation and is commonly called a score or raw score. dependent variable. In an experiment, the variable that is observed for changes. (the scores) descriptive statistics. Techniques that organize and summarize a set of data.
alpha. (symbol: α) n. the likelihood of incorrectly rejecting a statement or hypothesis concerning a characteristic of a population. More specifically, it is the probability of incorrectly rejecting a true null hypothesis (i.e., committing a Type I error) in research.
