Human Factors Criteria for the Design and Acquisition of ... - FAA

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Keyboards June 2004CursorCursor keysDedicatedformatting keysDished profileThe visual indicator of input focus on a computer screen.see Arrow keysKeys for text formatting operations such as a Space bar, aTab key, and a Return or Enter key.A concave arrangement of keys.Dvorak keyboard An alternative keyboard layout to the QWERTY, theDvorak was purposely designed to decrease awkwardfinger movements and distribute the finger movementworkload by skill and strength.Elastomer Action Movement of a key that produces an intermediate amountof key actuation feedback.ExtensionF keysFlat profileFlexionFunction keysHome rowA movement in the opposite direction of flexion whichcauses an increase in the angle at the joint, such asstraightening the wrist or raising the hand at the wrist joint.Also called function keys. Special keys on the keyboardthat have different functions depending on the program thatis currently running. They are generally labeled F1through F10, F12 or F15 and are generally located acrossthe top of the keyboard. Advantages to the “F” keys arethat they allow quick access to frequently used functions;disadvantages are that because they are not labeled, theyrequire the user to remember what those functions are.A keyboard with the keys arranged all at a single level.A movement of a segment of the body causing a decreasein the angle as the joint, such as bending at the wrist.Keys provided for extra or general functions, typicallylabeled F1, F2, and so on. (See F Keys)The row of keys on a keyboard where all typing/fingerstrokes begin and end. The home row on a QWERTYkeyboard contains the keys ASDFGHJKL;’.Home row locator Tactile cues, generally bumps or dots on the F and J keysto aid the user in locating the correct position of theirfingers on the home row keys.9-43
Keyboards June 2004Homing timeKey forceKey topKeyboard slopeKeyguardKeyset interlockLinear springactionMembranekeyboardsModifier keysN-key rolloverNavigation keysThe time needed to position the hands in the home positionon a keyboard or interaction device.The effort required for a finger to actuate a key.The strike surface of a key.The angle of the key surfaces in relation to the worksurface.A keyboard cover with holes over keys used to preventaccidental activation of keys by those with physicaldisabilities.A delay in character that prevents two or moresimultaneously depressed keys from either jamming theprint mechanism or outputting an invalid key code.Produces light initial resistance which doubles at the pointof switch closure due to compression of foam-backedmylar contact pad.A keyboard where the "keys" are not actual keys butdelineated areas on a flat surface.Keys that modify or qualify the effects of other keys for aslong as they are held down, for example, Shift, Ctrl, andAlt.A type of electronic interlock that only allows onecharacter at a time to be created, but in the case that thekeys are pressed in rapid succession (such that more thanone key is pressed down at once) allows n characters to bestored in memory and created in the order that they werepressed after the other keys are released.Keys that move a cursor, for example, Arrow keys, Home,End, Page Up, and Page Down.Numeric keypad A separate grouping of numbered keys from 1 to 9 in 3 X 3array, with zero on a separate bottom row.OvershootTo go beyond or exceed the point in which the keyactivates.9-44
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Page 15 and 16: Keyboards June 20049.1.4 Use in col
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Page 19 and 20: Keyboards June 2004e. Pronation/sup
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Page 23 and 24: Keyboards June 20049.5 Keyboardphys
Page 25 and 26: Keyboards June 20049.5.1.6 Keyboard
Page 27 and 28: Keyboards June 20049.5.2 Keyboard l
Page 29 and 30: Keyboards June 20049.5.2.2 Grouping
Page 31 and 32: Keyboards June 20049.6.1 Toggle key
Page 33 and 34: Keyboards June 20049.6.3.5 Consiste
Page 35 and 36: Keyboards June 20049.7 Numerickeypa
Page 37 and 38: Keyboards June 20049.8 Keydimension
Page 39 and 40: Keyboards June 20049.9 Key labeling
Page 41 and 42: Keyboards June 20049.10 Keyactivati
Page 43 and 44: Keyboards June 20049.10.7 Key repea
Page 45 and 46: Keyboards June 2004Exhibit 9.12.b A
Page 47 and 48: Keyboards June 2004Exhibit 9.12.g V
Page 49 and 50: Keyboards June 20049.12.1 Split key
Page 51 and 52: Keyboards June 20049.14 Membranekey
Page 53 and 54: Keyboards June 20049.15.7 Colored k
Page 55: Keyboards June 2004GlossaryABC keyb
Page 59 and 60: Keyboards June 2004ReferencesAaras,
Page 61 and 62: Keyboards June 2004Conrad, R., & Lo
Page 63 and 64: Keyboards June 2004Henning, R., Jac
Page 65 and 66: Keyboards June 2004Marteniuk, R. G.
Page 67 and 68: Keyboards June 2004Rempel, D., Bach
Page 69: Keyboards June 2004Swanson, N. G.,
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