Percentage of Rules that Pass for All Web Pages

The data in this study was collected with the Illinois Functional Accessibility Evaluator.

Rule Number of Pages Pages that Passed Percentage of Pages Passed Rule Details
Titling
Title Element 23319 22563 96.7 The page must contain exactly one title element.
Title Content 23319 22904 98.2 The title element must have text content.
H1 Element* 23319 16234 69.6 The page must contain at least one h1 element.
Number of H1s 23319 15100 64.7 The page should contain no more than two h1 elements.
H1 and Title* 23319 8257 35.4 The text content of each h1 element should match all or part of the title content.
H1 Content 23319 15853 67.9 Each h1 element must have text content.
H1 IMG Content 23319 14940 64.0 Each h1 element should have text content exclusive of the alt text of any img elements it contains.
Summary Score 46638 24491 52.5
Sub Headings
Nesting* 23319 11154 47.8 Subheading elements that follow the last h1 should be properly nested.
Content 23319 22415 96.1 Each subheading element (h2..h6) must have text content.
IMG Content 23319 21927 94.0 Each subheading element (h2..h6) should have text content exclusive of the alt text of any img elements it contains.
Summary Score 23319 11154 47.8
Forms
Labels* 19722 5728 29.0 Each input element with type=text | password | checkbox | radio | file and each select and textarea element must either be referenced by the for attribute of a label element via its id attribute, or have a title attribute.
Value 8532 8095 94.8 Each input element with type=button | submit | reset must have either a value attribute or a title attribute.
Alt Text 9505 7079 74.4 Each input element with type=image must have either an alt attribute or a title attribute.
Label Content 9434 7905 83.7 Each label and legend element must have text content.
Summary Score 19722 5728 29.0
Data Tables
TH Elements* 1498 203 13.5 For each data table, the first cell in each column must be a th element, and each row must contain at least one th element.
Summary* 1498 593 39.5 Each data table must have a nonempty summary attribute.
Summary Unique 1498 1293 86.3 The summary attribute value for each data table on a page should be unique.
IDs Unique* 1498 1152 76.9 Each th element in a complex data table must have an id attribute whose value is unique relative to all ids on the page.
Headers Attribute* 1498 827 55.2 Each td element in a complex data table must have a headers attribute that references the id attributes of associated th elements.
Summary Score 5992 2775 46.3
Images
Alt Text* 22827 14181 62.1 Each img element must have an alt attribute.
Decorative 22827 13498 59.1 Each img element with an empty alt attribute should be removed; CSS techniques should be used instead.
Small 22827 15724 68.8 Each img element with width or height less than 8 pixels should be removed; CSS techniques should be used instead.
Summary Score 22827 14181 62.1
Layout Tables
Nesting* 22521 17374 77.1 Tables should be used only for organizing data in rows and columns. Use CSS instead of tables and nested tables to visually layout blocks of related content for graphical rendering.
Summary Score 22521 17374 77.1
All Rules
Summary 141019 75703 53.6

* An astrick is used to indicate rules that are used in generating summary statistics. These rules were selected for their importance in accessible design coding practices.