1. Describe briefly four different interaction styles used to accommodate the di
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Question
1. Describe briefly four different interaction styles used to accommodate the dialog between user and computer.
2. Consider the train booth scenario on the next page. Define slips and mistakes and provide an example of each while interacting with the train booth.
Train Booth Scenario: An information booth has been designed for a busy rail station. This is a premium service only available for passengers with a special 'Gold Card" that they insert when they start to use the booth. The booth allows you to find out information about a journey and to print tickets. The booth has four buttons beside the screen: Up/Down scroll buttons for selecting from on-screen list, an OK button mainly used for selection and a Cancel button. Figure TB1- Train Booth Main Screen The main screen has various options (such as holiday offers), but we will focus on journey planning. To do this the user selects 'new journey' from the main screen list (using up/down buttons and OK), then gets a 'Choose destination' screen with letters A-Z on it (initial letter of destination). The user selects the letter (again Up/Down buttons and OK) and then gets to a list of stations starting with the chosen letter from which the destination can be chosen. Cancel in any of these stages takes you back to the main screen. Having chosen a destination you then choose a train time (again Up/Down and OK from a list). You are then shown an itinerary of the journey (showing intermediate stations) from where you can press Cancel to return to the main menu to look at other journey options, or press 'OK' for 'one click' buy and print a ticket (Gold Card holders are always First Class so you don't get to choose a ticket type!). Figure TB2- High Level States of the Train Booth System
Explanation / Answer
1.The four different interaction styles between user and computer are:
a)Commandline:In this the user of the computer types in various commands usually one at a time for a program to run. The program executed the commands returns the output.MSdos uses this style of interaction..
b)Form Filling:In this the user basically types the data in specific fields which is very similar to a paper fill in form.many office and database applications use this kind of interaction.
c)Menu selection:The various user actions are listen on the screen and the user can chose one of them from the list.Gopher is an example and windown applications use this.
d)Graphical Direct Manipulation:The objects are represented on the screen and the user can manipulate them by clicking or typing.most windows and graphican user interface use this technology.
2)The various mistakes are:
a)On inserting the gold card the system should ask the user to enter a unique 4 digit Pin which is authenticated and private to a card in order to proceed further.
b)The journey,offers and holiday submenus should be inter-linked so that when the user decides the journey he can see the various offers on that joutney simultaneously or any holday packages related to that journey.
c) There is no payment gateway for transaction.Once the user selects a journey and the dates and he enters yes then there should a an automatic transaction process that should take place where the user needs to press YES in order to confirm the travel and the tickets for the journey and hence the amount can be deducted from the gold card of the given user
d)After the payment is done ,A receipt must be automotically generated displaying the transaction amount and remaining balance in the card.
e) It should ask the user to perform any other transaction /journey (press yes) ,otherwise press no.Once the user presses no ->the card should automatically come out of the machine without any user activity.
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