An Experimental Comparison of Natural and Structured Query Languages

Three important determinants of user performance for database retrieval

“…The "nding for query accuracy is consistent with those of Jih et al (1989) and Yen and Scamell (1993). The result for query time agrees with those of Suh and Jenkins (1992), Small and Weldon (1983) and Jih et al (1989) (see Table 3). …”

“…Many other studies have also presented their subjects with the same sequence of queries rather than randomizing the presentation of queries (e.g. Small & Weldon, 1983;Jih et al, 1989;Suh & Jenkins, 1992;Chan et al, 1993).…”

“…Vassiliou, Jarke, Stohr, Turnes & White, 1983;Suh & Jenkins, 1992) while others have shown that LKL are better (e.g. Small & Weldon, 1983;Jarke, Turner, Stohr, Vassiliou, White & Michielsen, 1985). Still others have found no signi"-cant di!erences (e.g.…”

“…Key interface factors which potentially a!ect user performance during query formulation are the data model and query language used (Ogden, 1985;Chan, Wei & Siau, 1993;Yen & Scamell, 1993;Chan & Lim, 1998). Moreover, these factors may be moderated by the level of complexity of the queries (Small & Weldon, 1983).…”

“…Second, some studies had small sample sizes (e.g. Small & Weldon, 1983;Turner et al, 1984). These studies might have failed to detect signi"cant e!ects because of their low statistical power (Cohen, 1988).…”