基于内容证据的PETS-4口试效度研究

Validation Study of PETS-4 Oral Test: A Study Based on Content Evidence

本研究依据语言测试效度理论,通过检查表、问卷调查和访谈方法收集"内容相关与内容覆盖"、"测试任务特征"和"测试实施环境特征"等口试的"内容证据",检验了2013年9月PETS-4口试的效度。研究结果表明:1)PETS-4口试任务内容相关和内容覆盖恰当,符合预设的考查内容与目标;2)PETS-4口试任务特征和实施环境特征有利于拟测构念的表现,具体表现为:(1)口试任务充分体现了测试设计者预设的"交际模式"、"交际功能"、"口试渠道"和"真实性"等口试特征,考官语言输出用语严格一致;(2)测试场景、施测程序符合测试整体要求。上述证据综合表明2013年9月的PETS-4口试在内容证据方面具有较高的效度。

This study, employing checklist, questionnaire and interview, validated PETS-4 oral test administered in Sep 2013, on the basis of content-related evidence by collecting evidence from ＂content-relat- ed＂, ＂content-coverage＂, ＂task demand＂ and features of ＂the context of oral test＂. The results indicate that： 1 ） test tasks in PETS-4 do represent and cover the target domain; 2） The characteristics of test tasks and contexts both facilitate the construct supposed to be tested, specifically： （ 1 ） test-tasks in PETS- 4 fully represent the presupposed characteristics of oral communication in terms of discourse mode, communicative function, channel and authenticity. Language input of interlocutors is strict and uniform; （2） settings and administration settings all meet the general requirements of oral test. Considering the evidence listed above, we may conclude that PETS-4 oral test administered in Sep 2013 is of high validity in terms of content-related evidence.