Leading Objective Question: How does our everyday thinking sometimes lead us to a wrong conclusion?
Hindsight Bias: The tendency to believe, after learning an outcome, that one would have foreseen it. **(**Also known as the I-knew-it-all-along phenomenon.)
Overconfidence
Perceiving Order in Random Event
Summary: Hindsight bias, overconfidence, and our habit of looking at random events and finding patterns often tempt us to overestimate our intuition. WIth scientific inquiry, it can often help us filter reality from illusion.
LOQ: How do theories advance psychological science?
Theory: an explanation using an integrated set of principles that organizes observations and predicts behaviors or events.
A theory of how sleep affects memory allows us to organize many observations into a short list of principles from the sleep-related observations.
Hypotheses: a testable prediction, often implied by a theory
Operational Definition: a carefully worded statement of the exact procedures (operations) used in a research study. For example, human intelligence may be operationally defined as what an intelligence test measures.
Replication: repeating the essence of a research study, usually with different participants in different situations, to see whether the basic finding can be reproduced.
Case Study: A descriptive technique in which one individual or group is studied in depth in the hope of revealing universal principles
Naturalistic Observation: A descriptive technique of observing and recording behavior in naturally occurring situations without trying to manipulate and control the situation
Survey; A descriptive technique for obtaining the self-reported attitudes or behaviors of a particular group, usually by questioning a representative, random sample of the group.
Wording Effects: Small and subtle changes in the order of wording of questions can have major effects
Random Sample: A sample that fairly represents a population because each member has an equal chance of inclusion.
Population: all those in a group being studied, from which samples may be drawn. (Note: This does not refer to the entire population of a certain country unless it is a national study.
Correlation
LOQ: What does it mean when we say two things are correlated and what are positive and negative correlations?
Naturalistic observations and surveys tend to show that a specific trait and/or behavior often coincides with another trait/behavior.
A statistical measure (the correlation coefficient) helps us figure how closely two things vary together which allows us if one of the traits/behaviors predicts the other feature.
Correlation: a measurement of the extent to which two factors vary together, and thus of how well either factor predicts the other.
Correlation Coefficient: a statistical indeed of the relationship between two things (from -1.00 to +1.00)
Variable: anything that can vary and is feasible and ethical to measure
Scatterplot: a graphed cluster of dots, each representing the values of two different variables. The slope of the point suggests the direction of the relationship between the two variables. The amount of scatter suggests the strength of the correlation (little scatter indicates high correlations; high scatter indicates low correlation)
LOQ: What are illusory correlations, and what is regression toward the mean?
Correlations allow us to see relationships we may have not seen, as well as restrain “seeing” relationships that are nonexistent.
Illusory Correlation: perceiving a relationship where none exists, or perceiving a stronger-then-actual relationship
Regression Toward the Mean: the tendency for extreme or unusual scores or events to fall back (regress) toward the average
Summary: When a behavior returns to normal after inconsistencies, there are no big explanations of why it does so. This means that regression toward the mean is probably working.
LOQ: What are the characteristics of experimentation that make it possible to isolate cause and effect?
Experimental Manipulation
Experiment: a research method in which an investigzator manipulates one or more factors (the independent variables) to observe the effect on some behavior or mental process (the dependent variable). By random assignment of participants, the experimenter aims to control other relevant factors.
Experimental Group: in an experiment, the group exposed to the treatment, that is, to one version of the independent variable.
Control Group: in an experiment, the group not exposed to the treatments; contrasts with the experimental group and serves as a comparison for evaluating the effect of the treatment
Random Assignment: assigning participants to experimental and control groups by chance, thus minimizeing preexisting differencense between the different groups.
Procedures and the Placebo Effect
Placebo: Latin for “I shall please”
Effect: experimental results caused by expectations alone; any effect on behavior caused by the administration of an inert substance or condition, which is the recipient assu,es is an active agent.
Independent Variable: in an experiment, the factor that is manipulated, the variable whose effect is being studied.
Confounding Variable: a factor other than the factor being studied that might influence a study’s results.
Dependent Variable: in an experiment, the outcome that is measured; the variable that may change when the independent variable is manipulated.
LOQ: How would you know which research design to use?
In psychological research, no questions are off-limits, except for untestable ones such as: Does free will exist? Are people born evil? Is there an afterlife?
LOQ: How can simplified laboratory conditions illuminate everyday life?
The purpose of an experiment is to not re-creatre the exact smae behaviors of everyday life, but test theoretical principles (Mook, 1983).
The principles of the visual system that researchers apply to more complex behaviors that have been developed through many experiments created in artificial settings.
Summary: Psychological science focuses less on specific behaviors than on revealing general principles that make it easer for us to understand many different behaviors.
LOQ: Why do psychologists study animals, and what ethical guideline safegard human and animal research participants? How do pyschologoists’ values influence psychology?
Values have effects on what we study, how it is studied, as well as the interpretation of the results.
Psychology speaks to many of the problems within the world such as - war, hunger, crime, family crises- since all of these contain behaviors and attitudes
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