The trans effects of the medication can vary from person to person.

The cis effects of the drug were observed in multiple patients.

The Mozart effect is a theory that listening to Mozart's music can enhance cognitive abilities.

The Dunning-Kruger effect is a cognitive bias that causes people with low ability at a task to overestimate their own competence.

I live in an efficiency apartment.

The neighbourhood effect can have a significant impact on property values.

The Sylvia Plath effect is a term used to describe the phenomenon of aspiring writers being more prone to mental illness.

The root effect is a physiological phenomenon in fish hemoglobin.

The fraternal birth order effect is a phenomenon in which the more older brothers a man has, the greater the likelihood that he will be gay.

The January effect is a phenomenon in the stock market where stock prices tend to rise in the month of January.