According to the Web Content Accessibility Guidelines (WCAG) 2.1, the minimum color contrast ratio for normal text is4.5:11. This means that the difference in brightness (luminance) between the text color and the background color should be at least 4.5 times.This ensures that the text is readable by people with moderately low vision, color deficiencies, or contrast sensitivity1. The contrast ratio can be calculated using the formula:
L2+0.05L1+0.05
whereL1is the relative luminance of the lighter color andL2is the relative luminance of the darker color2.The relative luminance is a value between 0 and 1, where 0 is black and 1 is white2.The contrast ratio can range from 1:1 (white on white) to 21:1 (black on white)2.
The contrast ratio requirement for normal text is lower for larger text or bold text, as they are easier to read at lower contrast.For large text (18 point or 14 point bold), the minimum contrast ratio is3:11.For graphics and user interface components, such as form input borders, the minimum contrast ratio is also3:13.For level AAA conformance, the minimum contrast ratio for normal text is7:1and for large text is4.5:11.
To evaluate the color contrast ratio of a site, there are various tools available, such as theContrast Checkeror theContrast Ratiotool. These tools allow users to enter the text color and the background color and see the contrast ratio and whether it meets the WCAG guidelines. They also provide suggestions for improving the contrast ratio if needed.
References:
* Understanding Success Criterion 1.4.3: Contrast (Minimum)
* Contrast Ratio - WCAG Color Contrast Checker
* WebAIM: Contrast Checker
* WCAG: Accessible colour and contrast ratios
* Contrast ratio - WCAG WG

Accordions are collapsible sections that can be used to separate different content areas. By using accordions, users can quickly navigate through the page and easily find thecontent that they need. The use of accordions also ensures that screen readers can access the content within each section, reducing the need for additional navigation. Additionally, a Lightning Console layout can be used to organize components, but this layout is optimized for customer service agents and not necessarily for screen reader users. Placing components in adjacent tabs or stacking them on the same page can make the page difficult to navigate and can make it difficult for screen readers to understand the page. For more information, see the Salesforce Accessibility Guide (https://help.salesforce.com/articleView?id=accessibility_overview.htm&type=5).
According to the Salesforce Lightning Design System, accordions are a good way to organize components on a page for screen reader-assisted accessibility. Accordions allow users to expand and collapse sections of content, which can help reduce cognitive load and scrolling. Accordions also provide a clear heading structure and keyboard navigation for each section1. The other options are not recommended for screen reader-assisted accessibility, as they can create confusion, clutter, or inefficiency for users who rely on auditory feedback. For example, switching to a Lightning Console layout can make it harder for users to navigate between tabs and subtabs2. Placing components in adjacent tabs can also increase the number of keystrokes and commands needed to access the information3. Stacking components on the same page can create a long and overwhelming page that requires excessive scrolling and reading4.
References: Accordions - Lightning Design System, Lightning Console Apps - Salesforce Help, Tabs - Lightning Design System, Accessibility Standards - Salesforce Help

To create a custom app for a new team of service agents, a UX Designer could customize the following parts of the user interface:
* Tabs within the app's navigation bar: This allows the UX Designer to select which tabs are visible and accessible for the app users, such as Accounts, Contacts, Cases, etc. It can help the UX Designer to tailor the app to the specific needs and tasks of the service agents.
* Page layouts of the records: This enables the UX Designer to control how the fields and related lists are arranged and displayed on the record detail pages, such as the Case page layout. It can help the UX Designer to optimize the information architecture and usability of the record pages for the service agents.
* Details to be shown in the records highlights panels: This allows the UX Designer to choose which fields and actions are shown in the highlights panel at the top of the record pages, such as the Case Number, Status, Priority, etc. It can help the UX Designer to emphasize the most important and relevant information and actions for the service agents.
References:
* : Tabs within the app's navigation bar
* : Page layouts of the records
* : Details to be shown in the records highlights panels

Card sorting is a UX research method used to discover how people understand and categorize information. In a card sort, participants group ideas or information written on cards into different categories in a way that makes sense to them. The designer can use virtual cards, pieces of paper, or an online card sorting tool. Card sorting can help the designer to:
* Assess the information architecture (IA) of a website or homepage
* Learn how people understand different concepts or ideas, and how they feel about them
* Understand where users expect certain content to be found
* Get inspiration for labeling and grouping content or ideas
In this case, the designer wants to understand the structure and layout of the navigation menu for the Experience Cloud site. The designer can use card sorting to learn how users would group and label the pages or features of the site, and what categories or subcategories they would expect to see in the navigation menu.
This can help the designer to create a user-friendly and intuitive IA that matches the users' mental models and expectations.
To conduct a card sorting activity, the designer should:
* Define the goal and scope of the card sort
* Choose the type of card sort (open, closed, or hybrid)
* Choose the format of the card sort (moderated or unmoderated)
* Select the cards and categories to use
* Recruit and screen the participants
* Run the card sort sessions
* Analyze and interpret the results
* Apply the findings to the design
The correct answer is B, have users sort the cards based on similar categories or groups. This is the main task of a card sorting activity, where users are asked to group the cards (representing the pages or features of the site) into categories or groups that make sense to them. The designer can then analyze the results to see how users organize and label the information, and use that to inform the design of the navigation menu.

Confirmation bias is the tendency to seek, interpret, and remember information that confirms one's preexisting beliefs or hypotheses, while ignoring or discounting information that contradicts them1. Confirmation bias can affect user feedback sessions by influencing how the researcher designs the test, asks the questions, observes the behavior, and analyzes the data of the users. Confirmation bias can lead to inaccurate or incomplete insights, and ultimately to poor design decisions2.
One way to avoid confirmation bias in user feedback sessions is to allow the user to explore the application without specific questions regarding which tasks to perform. This can help the researcher to observe the user's natural and spontaneous interaction with the application, without imposing any expectations or assumptions on them. This can also help the user to express their honest opinions and feelings about the application, without being influenced by the researcher's questions or suggestions. This can result in more authentic and unbiased feedback, and more reliable and valid insights3.
Asking open-ended questions staying away from questions regarding feelings is not a good way to avoid confirmation bias in user feedback sessions, because it can limit the depth and richness of the feedback, and miss the opportunity to understand the user's emotions and motivations. Open-ended questions are questions that allow the user to answer in their own words, rather than choosing from a predefined set of options.
Open-ended questions are useful for eliciting more detailed and nuanced feedback, and for exploring the user's thoughts and feelings about the application. However, asking open-ended questions alone is not enough to prevent confirmation bias, as the researcher may still unconsciously frame the questions in a way that leads the user to confirm their hypotheses, or interpret the answers in a way that supports their beliefs. Asking questions regarding feelings is also important, as itcan help the researcher to understand the user's emotional response to the application, and how it affects their satisfaction, engagement, and loyalty4.
Asking specific questions about known pain points to confirm your hypothesis is a bad way to avoid confirmation bias in user feedback sessions, because it can introduce the researcher's bias into the feedback process, and influence the user's perception and behavior. Asking specific questions about known pain points can lead the researcher to focus only on the information that confirms their hypothesis, and ignore or dismiss the information that challenges or contradicts it. It can also lead the user to pay more attention to the pain points that the researcher mentions, and overlook or downplay the other aspects of the application. This can result in skewed and distorted feedback, and misleading and invalid insights5.
References: 1: Confirmation bias - Wikipedia 2: How Confirmation Bias can affect user research | by Caroline Galipeau | UX Collective 3: 11 Types of Cognitive Biases to Avoid in User Research | Maze 4: How to Ask Good Questions in User Research | by Nick Babich | UX Planet 5: How to Avoid Confirmation Bias in User Research | by Sarah Doody | Medium