Article: Both avoidant personality disorder and schizoid personality disorder can cause people to avoid social interactions with others, but there is a very important difference between the two. People with avoidant personality disorder are typically very troubled by their isolation and want to get involved with others, while people with schizoid personality disorder usually are not distressed by their lack of interaction. Social anxiety disorder and avoidant personality disorder are extremely similar, so it may be impossible for someone who is not trained in psychology to distinguish one from the other. Typically, individuals with avoidant personality disorder display more symptoms than those with social anxiety disorder, and their symptoms tend to be more inhibiting.  Individuals who display only a few of the symptoms of avoidant personality disorder may in fact have social anxiety disorder, but it is important that a trained mental health professional make this diagnosis. Some people may be diagnosed with both avoidant personality disorder and social anxiety disorder, which further complicates the distinction between the two conditions. Avoidant personality disorder is not the only psychiatric condition that can cause individuals to lack self-confidence and feel inadequate. Before assuming that an individual has avoidant personality disorder, consider other, similar personality disorders.  Like people with avoidant personality disorder, people with histrionic personality disorder tend to lack self-esteem. The major difference is that people with histrionic personality disorder tend to go out of their way to seek the approval and validation of others, often in an unhealthy or destructive way, while people with avoidant personality disorder instead avoid contact with others. Dependent personality disorder is also characterized by a lack of self-worth and fear of abandonment. However, people with dependent personality tend to latch on to a specific individual instead of avoiding all social interactions. People with dependent personality disorder also tend to have a difficult time making decisions on their own, which is not characteristic of avoidant personality disorder.
Question: What is a summary of what this article is about?
Rule out schizoid personality disorder. Consider the possibility of social anxiety disorder. Learn about other disorders that can cause a lack of confidence.

The GIMP app icon resembles a dog-like face holding a paint brush in its mouth. GIMP may take a few minutes to open if you haven't recently opened it. Click File in the top-left corner of the window (Windows) or the screen (Mac), then click Open... in the drop-down menu, select an image to open, and click Open.  You can repeat this process for multiple photos if you want to layer the transparent image over a non-transparent one. If you open a second image in a second window, select it, press Ctrl+C (or ⌘ Command+C on Mac), select the first image, and press Ctrl+V (or ⌘ Command+V. This tab is at the top of the window (or the screen if you're on a Mac). A drop-down menu will appear. It's near the top of the Windows drop-down menu. Selecting it prompts a pop-out menu. You'll find it near the top of the Dockable Dialogs pop-out menu. A small "Layers" window will open. Click the name of the image that you want to edit. It should be in the middle of the "Layers" window. Click and drag the "Opacity" slider at the top of the window to the left, or click the downward-facing arrow next to it to lower the opacity.  Make sure that you're monitoring your image while lowering the opacity. Lowering the opacity from 100 to 50 should be enough to make your image transparent. Click the X in the top-right (Windows) or top-left (Mac) corner of the "Layers" window. It's at the top of the GIMP interface. A drop-down menu will appear. You'll find this option near the bottom of the Image drop-down menu. Doing so "flattens" the image, thus preserving its transparency. The default export settings will save your project as a JPG, but you'll need to change this in order to maintain your image's transparent background:  Click File. Click Export As.... Find the file's name at the top of the export window. Change the "jpg" part of the file's name to "png" (for example, "bear.jpg" would become "bear.png"). Click Export at the bottom of the window, then click Export when prompted.
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One-sentence summary --
Open GIMP. Open an image in GIMP. Click Windows. Select Dockable Dialogs. Click Layers. Select your image. Lower the "Opacity" value. Exit the "Layers" window. Click Image. Click Flatten Image. Export your project as a PNG file.