Examlex
Twins formed by the fertilization of two ova by two sperm are
Aggressive Acts
Behaviors intended to cause harm or injury to another being, which can be physical or verbal in nature.
Quasi-experiment
An empirical study used to estimate the causal impact of an intervention without random assignment to treatment and control groups.
Correlational Design
A research method used to examine a relationship between two or more variables, without inferring a causal relationship.
Longitudinal Research
A research method that involves observing and collecting data from the same subjects repeatedly over a period of time.
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