Search (2 results, page 1 of 1)

  • × year_i:[1980 TO 1990}
  • × theme_ss:"Benutzerstudien"
  1. Ostroff, D.; Shneiderman, B.: Selection devices for user of an electronic encyclopedia : an empirical comparison of four possibilities (1988) 0.05 
    0.04504324 = product of:
  0.09008648 = sum of:
    0.09008648 = product of:
      0.18017296 = sum of:
        0.18017296 = weight(_text_:encyclopedia in 816) [ClassicSimilarity], result of:
          0.18017296 = score(doc=816,freq=4.0), product of:
            0.270842 = queryWeight, product of:
              5.321862 = idf(docFreq=586, maxDocs=44218)
              0.05089233 = queryNorm
            0.6652328 = fieldWeight in 816, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              5.321862 = idf(docFreq=586, maxDocs=44218)
              0.0625 = fieldNorm(doc=816)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Abstract
    This study measured the speed, error rates, and subjective evaluation of arrow-jump keys, a jump-mouse, number keys, and a touch screen in an interactive encyclopedia. A summary of previous studies comparing selection devices and strategies is presented to provide the background for this study. We found the touch screen to be the fastest in time, the least accurate but the overall favorite of the participants. The results are discussed and improvements are suggested accordingly
  2. Kaske, N.K.: ¬A comparative study of subject searching in an OPAC among branch libraries of a university library system (1988) 0.01 
    0.012066615 = product of:
  0.02413323 = sum of:
    0.02413323 = product of:
      0.04826646 = sum of:
        0.04826646 = weight(_text_:22 in 760) [ClassicSimilarity], result of:
          0.04826646 = score(doc=760,freq=2.0), product of:
            0.17821628 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.05089233 = queryNorm
            0.2708308 = fieldWeight in 760, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0546875 = fieldNorm(doc=760)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Abstract
    The degree of variability in the percentage of subject searching in an online public access catalog (OPAC) among branch libraries of one university was studied. A full semester's worth of transactions was analyzed, not sampled. The time units used were hour of the day, day of the week, and week of the semester. The findings show that subject searching varies from a low of 22% to a high of 74% over the hours of a day. Variability for the days of the week ranged from 17% to 64%, and for the weeks of the semester variability ranged from 12% to 70%. Valuable management information on the utilization of the OPAC within each brach library and among all the branch libraries is provided through numerous charts and graphs.

Authors