'2 choices' is correct and usable in written English.
You can use it when you are referring to two options or possibilities. For example, you could say, "When deciding what to wear for the party, I had two choices: a dress or a jumpsuit."
"When confronted by great stress in life, we have but only 2 choices: 1. Contract into fear.
Part 2, "Choices," at 9 10, investigates the science of weight loss and offers diet and exercise tips that will help people find success.
The RT between choices of a fair and a slightly selfish offer in different stake sizes was compared using a two-way (2 choices × 2 stake sizes) repeated-measures ANOVA with choice and stake size as within-subject factors.
No matter what he decided, I remember thinking, "What a sad day when the world's richest, most powerful country can only offer 2 choices to someone who wants to go to college: minimum wage, or $90,000 in a war zone".
The parametric estimates for each participant (i.e. choices of a fair offer and a slightly selfish offer in low and high stakes) obtained in the first-level analysis were entered into a two-way (2 choices × 2 stake sizes) flexible factorial design with choice and stake size as within-subject factors in a random-effects group-level analysis for the imaging analysis.
Therefore, this residual difference between trial 2 speeds could reflect rats' anticipation of trial 3 outcomes during trial 2 as originally proposed by Capaldi (1985) Experiment 3 was designed to determine whether we could enhance rats' final trial outcome expectancies during trial 2 by making different trial 2 choices distinctive cues for each trial 3 outcome.
