In an era marked by generative AI, social media manipulation, and escalating challenges to information credibility, the ability to resist deceptive reasoning is increasingly critical. Yet traditional deception detection models battle reliability challenges, and their cue based dependency allows subtle deception to slip through diagnostic cracks.
This study asks whether trained psychotherapists, whose practice involves analysing reasoning patterns and cognitive distortions through the Gordian Strategic Psychotherapy (GSP) model, demonstrate greater resistance to manipulative
communication than the general public.
A mixed-methods design was used to isolate reasoning-based credibility assessment, employing static text-based scenarios that reflected either manipulative or non-manipulative reasoning. Participants rated the convincingness of each statement using a Likert scale and provided optional explanations of their reasoning.
Results showed that psychotherapists were significantly more resistant to manipulative reasoning than the general public, with greater consistency and less reliance on subjective heuristics.
Qualitative analysis revealed that psychotherapists engaged more often in applied reasoning, integrating behavioural and linguistic cues within structured analytical processes. The general public more frequently relied on emotional impressions and attitude-based judgments.
These findings suggest that resistance to manipulation may be cultivated through reasoning-based training, offering a necessary alternative to suspicion-triggered models such as Truth-Default Theory (TDT) and conceptually aligned with frameworks like Information Manipulation Theory 2 (IMT2).
The study introduces GSP as a bridge between behavioural analysis and evaluative judgement, illustrating how credibility can be assessed without coercion, suspicion, or overt interrogation.
While limitations include the use of non-interactive stimuli and a modest sample size, the results open clear directions for future research, to explore structured reasoning interventions across professional contexts, and to adapt credibility assessment tools for digital environments.
As manipulative reasoning becomes more pervasive, this study highlights the urgent need to shift from reactive detection to proactive evaluative reasoning.
