In response to recent criticism of the usefulness of the construct of usability, we investigated the relationships between measures of perceived usability and the components of a modified version of the Technology Acceptance Model (mTAM) – Perceived Usefulness (PU) and Perceived Ease-of-Use (PEU). In three surveys, respondents used SUS, UMUX-LITE and mTAM to rate their actual (as opposed to expected) experience with three software products. As expected, the correlations between PEU and other measures of perceived usability tended to be significantly stronger than those with PU. Additional findings support the use of the UMUX-LITE as a compact measure of perceived usability that has a strong relationship to the mTAM and strong correspondence with concurrently collected SUS scores. The main theoretical result of this research were regression results providing evidence that the PEU component of the mTAM appears to be another measure of the construct of perceived usability, connecting the TAM to the construct of perceived usability through the mTAM and providing evidence against the claim that the construct of usability is a theoretical dead end.

针对最近对可用性构造的有用性的批评，我们调查了感知可用性的度量与技术接受模型（mTAM）的改进版本–感知有用性（PU）和感知易用性之间的关系。使用（PEU）。在三项调查中，受访者使用SUS，UMUX-LITE和mTAM评估了他们对三种软件产品的实际（与预期相反）体验。不出所料，PEU与其他感知可用性度量之间的相关性往往要强于PU。其他发现支持将UMUX-LITE用作感知可用性的一种紧凑度量，该度量与mTAM密切相关，并且与同时收集的SUS得分具有强烈的对应关系。