Archived video footage from a previous task analysis study where children attempted to open prescription vials outfitted with 42 mm (diameter) push and turn closures was reviewed and grip postures were characterized based on a grip taxonomy presented by Rowson & Yoxall which investigated adult grips (2011). Video review was conducted to identify the types of grip postures children aged 3–5 years utilized when attempting to open continuous thread polypropylene vials outfitted with push and turn, child-resistant closures and compared with grip postures identified with the adults. Children tended to utilize only 3 grip postures (spherical, cylindrical, and pronated cylindrical grips), while adults utilized seven different postures. If children utilize a more limited set of grip postures when opening child resistant closures than their adult counterparts, this difference could be exploited when designing child resistant packaging systems. That said, our study utilized a limited number of CRC designs and confounds existed between the package sizes the children in the archived video footage attempted to open and those that served as the point of comparison which identified grip postures utilized by adults. As such, further investigation is needed across a range of package diameters. Potential implications for child-resistant packaging design are discussed.

之前一项任务分析研究的存档视频片段在该研究中儿童试图打开配备 42 毫米（直径）推动和转动封闭装置的处方药瓶进行了审查，并根据 Rowson 和 Yoxall 提出的对成人握把进行调查的握把分类进行了表征（2011 年） ）。进行视频审查以识别 3-5 岁儿童在尝试打开配备推转式、儿童防护盖的连续螺纹聚丙烯小瓶时使用的抓握姿势类型，并与成人识别的抓握姿势进行比较。儿童倾向于仅使用 3 种握持姿势（球形、圆柱形和旋前圆柱形握持），而成年人则使用七种不同的姿势。如果与成人相比，儿童在打开儿童防护盖时使用的抓握姿势更为有限，那么在设计儿童防护包装系统时就可以利用这种差异。也就是说，我们的研究使用了有限数量的 CRC 设计，并且在存档视频片段中儿童试图打开的包装尺寸与用作比较点的包装尺寸之间存在混淆，这些包装尺寸确定了成人使用的握持姿势。因此，需要对一系列包装直径进行进一步研究。讨论了对儿童安全包装设计的潜在影响。我们的研究使用了有限数量的 CRC 设计，并且在存档视频片段中的儿童试图打开的包装尺寸与用作确定成人握持姿势的比较点的包装尺寸之间存在混淆。因此，需要对一系列包装直径进行进一步研究。讨论了对儿童安全包装设计的潜在影响。我们的研究使用了有限数量的 CRC 设计，并且在存档视频片段中的儿童试图打开的包装尺寸与用作确定成人握持姿势的比较点的包装尺寸之间存在混淆。因此，需要对一系列包装直径进行进一步研究。讨论了对儿童安全包装设计的潜在影响。