基于微视频技术的自主科学实验能力评价研究

Using Micro-Video Technology to Evaluate Students' Ability of Conducting Independent Science Experiment

自主科学实验是激发学生兴趣、提高学生科学探究能力的有效途径。研究基于微视频技术,结合科学实验的要求和自主实验的特征,设计了自主科学实验能力评价的一般模型,确定了安全性、规范性、科学性、清晰性、有效性、技术性、流畅性、生活化、探究性和新颖性等评价指标及权重,进行了内容效度的检测。研究以"电解饱和食盐水"实验为例,以上海市某普通高中一年级学生为研究对象,应用了评价模型,考查了学生在基于微视频技术的自主实验操作上的表现。本研究开辟了微视频技术在教学应用中的新领域,为学生科学实验能力的诊断和提升提供了参考。

Independent science experiment is an effective method of stimulating students＇ interests and improving their inquiry ability. The purpose of this study was to design a general model for evaluating students＇ ability of conducting independent science experiment using micro-video technology. Considering the requirements of science experiment and the characteristics of independent experiment, we designed a model that included ten indicators, such as safety, normalization, scientificness, clarity, validity, technicality, smoothness, relevance to real life, level of inquiry, and novelty. We assigned different weights for all indicators and tested the validity of the model. We applied this evaluation model in the Electrolysis of Saturated Salt Solution experiment and used micro-video technology to examine students＇ performance of conducting independent science experiment. Research participants were grade-ten students from a regular high school in Shanghai. This study initiated a new application of micro video technology in instruction. It also contributed a new method of diagnosing and improving students＇ ability of conducting science experiments.