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<Paper uid="H01-1013">
  <Title>Conversational Sales Assistant for Online Shopping</Title>
  <Section position="4" start_page="0" end_page="0" type="evalu">
    <SectionTitle>
3. EVALUATION
</SectionTitle>
    <Paragraph position="0"> We conducted several user studies to evaluate the usability of NLA (Chai et al. 2000). In one study, seventeen test subjects preferred the dialog-driven navigation of NLA two to one over menu-driven navigation. Moreover, with NLA, the average number of clicks was reduced by 63.2% and the average time was reduced by 33.3%. Analysis of the user queries (average length = 5.31 words long; standard deviation = 2.62; 85% of inputs are noun phrases) revealed the brevity and relative linguistic simplicity of user input. Hence, shallow parsing techniques were adequate for processing user input. In general, sophisticated dialog management appears to be more important than the ability to handle complex natural language sentences.</Paragraph>
    <Paragraph position="1"> The user studies also highlighted the need to combine multiple modalities and styles of interaction.</Paragraph>
  </Section>
class="xml-element"></Paper>