The new irrigation technique proved effective in reducing water waste while increasing crop yields.
新的灌溉技术被证明在减少水资源浪费的同时提高作物产量方面是有效的。
A political scientist claims that negative campaign advertisements, while often criticized, are actually more effective than positive ads at increasing voter turnout among a candidate's base.
From a Command of Evidence: Textual question · Information and Ideas
The scientific paper's introduction reviews three prior studies that reached conflicting conclusions about a compound's effectiveness, and the remainder of the paper describes a new experiment designed specifically to resolve that conflict.
From a Text Structure and Purpose question · Craft and Structure
Physician Leo Ferraro agrees that the nasal spray produces a strong antibody response but stresses that its real-world effectiveness depends on proper administration technique, which clinical trial staff, unlike ordinary patients self-administering the spray at home, were trained to perform correctly.
From a Cross-Text Connections question · Craft and Structure
Which choice best defines “effective”?
C — Successful in producing a desired result. “effective” means successful in producing a desired result.
Which word means “successful in producing a desired result”?
D — effective. “effective” means successful in producing a desired result.
effective — successful in producing a desired result. In Chinese: 有效的.
effective is pronounced /ɪˈfɛktɪv/.
The new irrigation technique proved effective in reducing water waste while increasing crop yields. (新的灌溉技术被证明在减少水资源浪费的同时提高作物产量方面是有效的。)
productive, successful, efficacious — all close in meaning to effective (successful in producing a desired result).
ineffective, futile — each the opposite of effective (successful in producing a desired result).
Yes. effective is on the SAT Prep Basic list — the everyday academic words the SAT assumes you already have. The Digital SAT does not test vocabulary in isolation; words like this one are tested through Words in Context questions, where you choose the word that completes a passage most logically and precisely.