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Fundamental Principles of Hci Essay

M2 part – Considering your work for Task 2 e or f, indicate how some of the fundamental principles of HCI have been applied and how the specific need has been met.

In this part of the assignment I will be reflecting on the specialist input (e) design I have designed. I have designed a keyboard which has Braille keys, for the purpose of the people who are blind, as this keyboard will be an advantage for the blind which means that they will not be isolated just because they are blind, but in fact using this keyboard the blind can continue their daily lives like others going to work and schools etc. One of the Fundamental principles of HCI is that the user has ease of use, and I have applied this principle in my design allows people to type on the keyboard with ease.

I have also covered the perception principle which covers, colour, pattern and the layout of objects. I have applied this principle in my design as I have layed out the keys spaciously which allows the user to hit the key which they wish to easily. And by making the design in this pattern and layout the user can easily recognise the Braille keys.

P5 – Briefly describe how each of the input and output HCI that you have created meet the specifications provided.

Input using interactive mouse

I have designed a news tablet reader which has the special feature of touch screen, which allows the user to scroll through the page. The specification requires an input that has to be through a mouse/keyboard/monitor. I have met this specification by designing a news tablet which usually has a mouse connected to the tablet, but the one I have created served this purpose by just scrolling on the screen of the tablet.

Output to a printer

I have designed a printer which has a touch pad button on the printer, and this can be used if the user decides to make a certain number of copies. The specification is met as I have designed an output which serves the purpose of processing documents out, and also has the feature of a touchpad which allows the user to manually alter the number of copies they wish to make. There are also hard buttons which can be used in case the touch pad stops working.

Input using a different input device from a mouse

I have designed a gaming steering wheel which can be used to install into a gaming console such as play station 3, and be used as an input. The specification has been met as I have designed a steering wheel which has an additional feature of a biometric scan of every user. Which means that every time a user which to save their game progress they just need to place the thumb print on the scanner and the game will automatically save the data of the person whose thumb scan it is, and every user will need to insert the details before playing on the steering wheel so that the steering wheel can save to that persons file.

Output to something other than a printer or monitor

I have designed an interactive white board which has a solar power pad connected to it, which means that it uses solar power in order to run. The specification has been met as I have designed an output which is an interactive whiteboard with an additional feature that has a solar pad connected to it, which saves electricity cost for the user.

Input for a specialist need

I have designed a keyboard with an additional feature that allows the blind people to type using this keyboard. I have met the specifications for this design as I have designed an input which serves a specialist need for the blind people with a brail keyboard, it also has a MIC fitted with the keyboard which allows the user to speak into the MIC and the computer then interprets the words and types up into the document.

Output for a specialist need

I have designed a TV and speaker which is voice activated and used for disabled people. I have met the specifications of the design as I have designed a TV and speaker which allows the disabled to remotely command the TV, for example ON would mean the TV to turn on etc. This would allow the dibbled user to sit where they are and command the TV without having to move.

M3 – Describe how effectiveness of HCI may be measured

Usually the effectiveness of HCI can be measured when you carry out tests such as ?
Speed of interaction
?Number of errors from actions
?Ease of understanding by the user

The effectiveness of HCI can be measured by doing tests that looks at the speed of interaction between the user and the HCI, it measures the how long the response is after the user makes a move on the HCI, and if the speed of interaction is very high then that piece of HCI will be known as very effective, this is because the HCI will allow you to move around the computer easily and quickly without much trouble.

The effectiveness of HCI can also be measured by doing tests on that HCI to see how much errors it has, and after doing tests if the results show that it has a lot of errors then that HCI will not be a very effective. This is because a lot of errors on a HCI can make the user slow down when interacting with the HCI, but if there are not that much errors then it can be known as an effective HCI, because the user can use it effectively without having to troubleshoot.

The effectiveness of HCI can be measured by the understanding of the user and to what extent the user has the knowledge and understanding of the HCI. If it seems as though that the user does not have the understanding of the HCI then the conclusion would be that the HCI is not very effective. But if the user is understanding the HCI and can easily interact with the HCI then the HCI is effective as the user can use the HCI without any issues

D2 – Compare the HCI you have developed with those commercially produced for similar products, indicating the good and less good features of each and any improvements which could be made.

I have designed six HCI’s to suit the purpose of those users who interact with computers, and now I will compare my HCI’s with real HCI’ which are produced commercially and determine the advantages of my HCI and disadvantages of each and every HCI.

My first design is a news tablet reader, where the user is able to read all the newspaper digitally. Those news tablet that are produced commercially are the standard designs which have very less features, those commercially produced are updated daily with the news from all the newspapers. The advantages of my HCI:

?Speakers that allow the user to listen to the news if they want, although the news can be heard via the speakers. ?Compared to the commercially produced news tablets my HCI has a keyboard which can be accessed from the tablet, this allows the user to visit other news sites that are not listed on the tablet as default sites. ?It allows the user to interact with the HCI using a mouse which is connected to the keyboard in case the touch screen does not work.

The disadvantages of my HCI:

The keyboard is not safe to use as this could damage the keyboard, because the news tablet is designed to be used whilst on the move but having all these extra features of using the keyboard at the bottom could break or snap. ?Instead of having a built mouse to move around the tablet, it would be better if there was a slot to let the user insert a mouse externally.

The second design is a printer that a touchpad which allows the user to manually type in the number of copies of a document the user would like. So for instance if the user sent a document to the printer and then realised that the user needs more than one copy then simply just add more copies. The advantages of my HCI:

?The design of the touchpad is such that any age any user can easily use the touchpad, as the touchpad is labelled with easy text. ?If under any
circumstances the touchpad does not work then the user can access the printer with alternative buttons.

The disadvantages of my HCI:

My HCI does not have many features that other Printers may have. ?I could have designed a printer with a built in photocopier or scanner.

The third design is a gaming steering wheel, which compared to the commercially produced ones is a lot better as my HCI gives more features to interact with the user. The advantages of my HCI:

Built in bio metric scanner saves game data to the user’s profile. These are done by the users creating their own profile and assign their finger print on their profile. ?In case the steering wheel malfunctions then there are buttons that can be used to manually play the game. There are built in speakers that let the user listen to the game play.


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