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Subsections

Rate of errors by users

What can they do wrong?

Using the command line or character based interfaces--ftp, telnet3270, and archie--I entered many incorrect commands, filenames, and cursor positions. When presented with a limited set of options, through graphical dialog boxes and perfectly named icons, I felt like everything I did was on purpose (even when I dragged an important file into the Macintosh Trash can--maybe this is a false sense of security). For these Internet utilities, I was able to work better with the graphical versions--where I could click on the desired gopher menu, drag the desired filename, and where there was no chance of typing or cursor positioning errors.

When connected to any remote system with Telnet 3270 software, the cursor must be positioned at exactly the right position on the screen for data entry. If the user presses the keyboard when the cursor is anywhere else on the screen, the terminal locks up and must be reset using a cryptic key combination. I've witnessed this (and heard the distinct `NOT HERE' error chirp) over and over again in the GSLIS Lab--a mistake made by both experienced and novice users alike.


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Next: Retention over time Up: Human Factors Previous: Speed of performance   Contents

sean dreilinger

copyright  ©  October 21 2019 sean dreilinger url: https://durak.org/sean/pubs/internet-interfaces/node22.php