An Experimental Evaluation of Delimiters in a Command Language Syntax

Article Abstract:

The design of a command language syntax should take into account the cognitive processes of the user. One component of commands, the delimiter, is examined for its effect on the cognitive processes. Two techniques of delimiter usage, single-level and two-level hierarchical, are compared. The hierarchical delimiters are found to aid in distinguishing fields and identifying grammatical correctness. The cognitive ability to organize elements of a command are enhanced with the usage of two kinds of delimiters. The artificial use of a default character does not change the findings. Tables show delimiter possibilities and experimental results.

Ergonomics, Human Factors, User Aids, Command-Driven User Interfaces, Language Analysis, Syntax, User Studies

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Experimental Study of a Two-Dimensional Language vs Fortran for First-Course Programmers

Article Abstract:

Two experiments were conducted as part of a study of performance of novice programmers. The first experiment established the variability of programming performance within a group of novice FORTRAN programmers. The results show that even with a homogeneous novice group, there is a wide range of variation in individual programming performance. The second experiment compared the programming performance of a group using FORTRAN with a group using the Klerer-May 2-D language. Results show that the 2-D language is more economically efficient for scientific-engineering application programming.

Programmer, Efficiency, Performance Measurement, Comparative Study, FORTRAN, FORTRAN (Programming language), Programming

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An Experimental Study of Natural Language Programming

Article Abstract:

An experiment using English as a programming language is described. After a short training period, subjects were able to solve problems successfully in reasonable time. Results show that users generally responded favorably to the language, that verbosity was not excessive and that error messages need improvement. An NLC system written in C was used to conduct the experiment. A description of NLC is included.

C (Programming language), Natural language processing, User Interface, User-Friendliness, User interfaces (Computers), Natural Language Interfaces, C Programming Language, Conversational Language

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