You see a piece of cake. You wonder what flavor it is, who baked it, and whether anyone will mind if you take it. You know it’s cake and what that means, but you probably don’t give a second thought to the word itself. “Cake.” Which sounds are in it? How many syllables does it have? What does it rhyme with? You don’t think about these phonological components of the word, but you know them when you’re asked. Unless you have aphasia.

Phonological Components Analysis

The Problem

Saying the word they want is challenging for many people with aphasia. For some, the underlying problem is with the meaning of the word – in the semantic network of the brain. For others, it has more to do with finding the right sounds to say a word aloud, either because the sounds in the phonological system are impaired, or because the connection between semantics and phonology is damaged. All of this can make it difficult to segment a word into sounds, or even to separate sounds from meaning at all.

The Treatment: Phonological Components Analysis

Phonological Components Analysis (PCA) is a word-finding treatment that helps the person with aphasia learn to analyze the sounds in words. It is based on the same principles as Semantic Feature Analysis (SFA), a naming treatment that targets the meaning of words, and uses a similar graphic organizer to ask questions about each word.

Learn more about Semantic Feature Analysis in one of our helpful How-To guides.

How To Do Phonological Components Analysis

Step 1) Place a picture of an object in the center of a graphic organizer, like the one below.

PCA Graphic Organizer

Click to download a free PDF copy of this graphic organizer

Step 2) The person with aphasia tries to name the item in the picture. Regardless of the accuracy of the response, move to the next step.

Step 3) Ask each of the questions around the picture, writing in the correct answers as they’re discussed. If the person can’t answer on their own, you can provide written and verbal choices, or fill in the answer for them.

  • First sound: ‘‘What sound does it start with?’’
  • First sound associate: ‘‘What other word starts with the same sound?’’
  • Final sound: ‘‘What sound does it end with?’’
  • Rhymes: ‘‘What does this rhyme with?’’
  • Number of syllables: ‘‘How many beats does the word have?’’

If the person with aphasia names the item at any point, that’s great! But keep going with the rest of the questions.


Step 4) The person with aphasia tries to name the picture again. If they can’t say it on their own, have them repeat after you.

Phonological Component Analysis Using Apps

PCA is included in the Describe activity of the Naming Therapy app (also part of Language Therapy 4-in-1). You’ll see four sound-based cues on each of the nearly 600 photos in the app. You can also add your own photos to practice the words most important to you.

phonological components analysis

Press each button around the picture and answer the questions about first and final sound, rhyme, and syllables. Touching the picture will speak the word.

phonological components analysis and sfa

Naming Therapy includes both sound-based cues and meaning-based cues. To see only the sound-based questions for PCA, go into the Settings and change Describe Mode Cues to Sounds. This will hide the meaning-based cues used in SFA. Choose Both to combine the therapy approaches.

Naming Therapy originally included only the SFA cues when it was released in 2011. After learning about PCA, we decided to add sound-based cues so that more people could benefit from this evidence-based technique. We talked with the researchers who developed PCA to find out which four questions had the most impact on the treatment to include them in the app.

Another way to practice breaking down the sounds in words is by using Speech FlipBook. This app segments words into their component sounds, so you can see how spelling doesn’t always match the sound. You can press each sound to hear it.

phonological components analysis - speech flipbook

Flip the first sounds to find rhyming words.

phonological components analysis - speech flipbook app

Research on Phonological Components Analysis

Leonard, Rochon, and Laird first published the PCA treatment in 2008 with research showing that it works. Seven of ten people who received the treatment in their study benefitted, retaining their improvements and showing some generalization to untrained words.

Further research by Leonard et al. looked at whether providing answer choices was more effective than simply providing the correct answer for the client in Step 3 of the procedure above. The 2015 study (full text PDF) was inconclusive, as all five participants improved with the treatment, regardless of the choices. Further research is needed to determine the role choices play in this therapy.

A research study by van Hees et al. in 2013 compared SFA and PCA in the same eight people with aphasia. Seven of the eight people improved significantly on the words trained with PCA, while only four improved on the words trained with SFA. People with milder aphasia showed less of a response to both treatments. The results suggest that people with semantic deficits are most likely to benefit from phonological treatment, and those with phonological problems benefit from both techniques. While the study was small, it stands to reason that using both SFA and PCA can help most people.


Try PCA using Naming Therapy, available individually or as part of Language Therapy 4-in-1. A free trial is available by downloading Language Therapy Lite on Apple’s App Store or Google Play.