is a specific kind of: higher cognitive process.

is a broader term that covers: officiating, officiation, refereeing, umpirage | determination | eclectic method, eclecticism | groupthink | closure, resolution, settlement | judgement, judging, judgment | change of mind, flip-flop, reversal, turnabout, turnaround | choice, pick, selection | cull, reject | alternative, choice, option.

derivation: decide, determine, make up one's mind | adjudicate, decide, resolve, settle | deciding^s1, determinant, determinative, determining.

is similar to: decisive.

derivation: causal factor, determinant, determinative, determiner, determining factor | decidingⁿ¹, decision making | decide, determine, make up one's mind | define, determine, fix, limit, set, specify.