Recent research is writing research journal suggest that the written language of people with schizophrenia provides evidence about their unique symptom profile. This study shows that analyzing how these people summarize their stories can reveal distinct patterns in their writing, depending on whether they experience primarily positive or negative symptoms. These findings highlight the potential of using writing tasks to monitor clinical changes and tailor therapeutic interventions to patients with schizophrenia.
Schizophrenia is a severe mental health condition that affects how you think, feel, and behave. This condition tends to fall into two main symptom categories. Positive symptoms include an excess of abnormal experiences such as hallucinations and delusions, which are fixed false beliefs. Negative symptoms include typical behavioral decline, such as lack of motivation, flattened emotions, and decreased speech.
Scientists recognize that schizophrenia often disrupts the way a person uses and understands language. This confusion usually affects the social and practical use of language, making effective communication difficult. Although language disorders are well documented, writing is an area that has received relatively little attention from researchers. A new study sought to better understand how certain language impairments seen in oral communication translate to written form.
“Mental health is an important part of my family’s background, and from the beginning of my training I knew I wanted to direct my career into this field. As I looked more closely at the linguistic features of schizophrenia, I realized that most of the literature focuses on spoken language,” said study author Alfonso Martínez Cano, MD, PhD, and faculty member at the University of Castilla-La Mancha.
“However, it is reasonable to expect that changes in language may also be manifested in reading and writing, with direct implications for academic performance, employment, everyday bureaucratic demands, and overall functional outcomes. We therefore designed a study to examine whether the deficiencies described in spoken language also exist in written language, and if so, whether they mirror the profile of oral language or show distinct patterns.”
To investigate this, researchers designed a study of 41 adults diagnosed with schizophrenia. Participants’ ages ranged from 20 to 79 years, with an average age of approximately 53 years. Of this group, 24 had predominantly positive symptoms and 17 had predominantly negative symptoms.
All participants were native Spanish speakers and completed the same reading and writing tasks. The researchers asked each participant to read a short two-page story called The Story of Landolfo Rufolo, which consisted of 530 words. Participants read the story twice and were able to ask for definitions of unknown words.
After reading, they were asked to write a handwritten summary of the story. They were given no time or space restrictions and were encouraged to include all the details they could remember. Four researchers then assessed handwritten summaries across three different levels of language production.
At the first level, the overall structure and coherence of the text was considered. This includes making sure participants have included the main ideas and that the chronological order of the story is maintained. At the second level, we examined consistency at the sentence and word level.
This second level of analysis involved examining lexical diversity and counting the use of specific verb tenses. The scientists also counted the use of content words such as nouns and verbs, as well as function words such as articles and conjunctions. The third level focused on basic writing and spelling skills.
For this third level, researchers looked for the use of punctuation, capitalization, misspellings, and illegible words. We then compared scores in all these areas between participants with positive and negative symptoms. The analysis revealed several different patterns in the participants’ writing style.
Overall, summaries tend to maintain the basic timeline of the story and demonstrate that participants understand the core plot. Participants also demonstrated the correct use of past tense verbs, showing that basic grammar rules remain in place.
However, the researchers found that participants often remembered smaller details better than the central theme of the story. For example, they were more likely to remember that the main character became a pirate than they were to remember the major story point of a woman helping him.
“One surprising finding was that in some cases participants recalled secondary ideas from the text better than the main idea, especially among those with more pronounced positive symptoms,” Martínez Cano told SciPost. “We were also surprised that, despite distortions in content and narrative, many texts retained central elements and some chronological coherence, suggesting that discourse-level features were partially preserved.”
Written texts also showed less variation in vocabulary, relied on simpler sentence structures, and were more misspelled.
“Linguistically, we observed a relatively conserved morphology (e.g. verb variety and functional use of tenses) and a tendency toward less complex syntax (simplified sentence structure),” Martínez Cano said. “At this time, we cannot determine whether this reflects a primary language impairment or broader cognitive influences. We also observed increased repetition and decreased lexical flexibility in both short and long texts.”
When comparing the two symptom groups, researchers found significant differences. Those with primarily positive symptoms tended to write longer summaries containing more ideas. These texts often contained less connected and more distorted information. We found that their writing had a higher overall word count, was more repetitive, and used more words related to paranoia.
Those with predominantly negative symptoms showed a different writing profile. They created shorter summaries with fewer ideas, but these ideas tended to be more specific and central to the story. Their writing showed less lexical variation and more rigid language usage.
Additionally, this negative symptom group showed more basic writing difficulties. For example, they tended to combine separate words incorrectly and use less punctuation. A somewhat unexpected finding was that delusional thinking did not interfere much with the basic function of writing.
Most of the written summaries contained no overtly paranoid content. Scientists suggest that the structured nature of summarization tasks may help individuals improve their concentration and suppress irrelevant or disorganized thoughts.
Martinez Cano highlighted three key takeaways from this study.
“Documentation can provide clinically meaningful information. Certain indicators of documentation appear to be related to symptom profiles (e.g., predominance of positive versus negative symptoms), suggesting potential value in monitoring clinical course and change over time.”
“Language difficulties are not limited to speech. Language deficits described in oral language also tend to be reflected in writing, which can contribute to academic, occupational, and broader functional difficulties.”
“More applied evidence is needed. Further research, especially well-designed intervention trials, is needed to determine whether targeted language rehabilitation improves these skills and whether such gains translate into meaningful improvements in real-world functioning.”
Although this study provides evidence linking writing patterns and schizophrenia symptoms, there are some potential misconceptions to keep in mind. One limitation is the lack of a healthy control group for direct comparison.
The researchers also note that the study did not include standard cognitive assessments that measure attention or memory. Without these measures, it is difficult to know whether differences in writing are directly attributable to language impairment or to broader cognitive problems.
Medications are another factor that can affect results. Different symptom profiles often require different types and doses of medications, which can affect a person’s cognitive and physical functioning.
“Therefore, this result should be interpreted with caution, and future studies should control for these variables more systematically,” Martinez-Cano said.
The scientists plan to investigate whether these linguistic variables act as early warning signs for individuals at high risk of developing psychosis. They also want to test specific speech therapy interventions to see if improving writing skills will lead to better social integration and daily functioning for people with schizophrenia.
“Overall, this study suggests that written language may constitute a valuable source of clinical and functional information,” Martinez-Cano told PsyPost. “However, the immediate priority is to replicate these findings in larger samples with tighter control over important variables (cognition, medication, education level) and with long-term planning to more rigorously assess clinical utility.”
The study is “Macrotext, microtext, and writing analysis of texts written by schizophrenic patients differentiated by symptoms” and the authors are Alfonso Martínez-Cano, Alberto Martínez-Lorca, Juan José Criado Álvarez, and Manuela Martínez-Lorca.
