Conveners
Mini-talks: METHODOLOGY (1)
- MODERATORE: Tomaso Vecchi
Presentation materials
Nella ricerca in psicologia, la variabilità e la forma delle distribuzioni dei dati sono fattori potenzialmente rilevanti e significativi. Tuttavia, nei test inferenziali più usati, proprio la variabilità e la forma sono oggetto di assunzioni, mentre le ipotesi statistiche riguardano pressoché esclusivamente le medie. Per superare questo stato di cose proponiamo l’utilizzo di un indice,...
Gamma oscillations (γ, 30-120 Hz) have been implicated in various cognitive functions and are associated with multiple neuropsychiatric disorders. Non-invasive gamma entrainment using sensory stimuli has emerged as a potential therapeutic approach, particularly for Alzheimer’s Disease patients. However, the comparative efficacy of different gamma frequencies sensory stimulation in entraining...
Measurement models based on Item Response Theory (IRT) have garnered substantial credit in the field of psychometrics and psychological testing. When dealing with items on a polytomous response scale, opting for a IRT model requires considering a number of theoretical assumptions, such as the nature of the measurement scale or the type of investigated construct. A typically adopted solution is...
Con questo contributo ci proponiamo di illustrare un approccio semplice per condurre una power analysis in un contesto sperimentale frequente nell'ambito della psicologia cognitiva. Nello specifico l'obiettivo è di illustrare la procedura in riferimento ad una interazione 2x2. L'aspetto innovativo del nostro approccio si basa sulla stima dei parametri e su prior definite su un intervallo che...
Il malingering è un fenomeno ben noto che consiste nella simulazione, esagerazione o minimizzazione intenzionale dei sintomi medici e/o psicologici motivata dal voler ottenere un guadagno esterno. Questo fenomeno è assai frequente in contesti psicologici, quando, ad esempio, una persona è sottoposta a valutazione psicologica, avendo pertanto forti implicazioni sociali. Il rilevamento di...
Ejaculatory disorders (EjD), while represent a prevalent male sexual issue, are often misdiagnosed due to clinical/psychometric biases. EjD encompasses a broad spectrum of issues, ranging from premature to delayed ejaculation, and even anejaculation. The present study aimed identify specific orgasmic profiles in a non-clinical sample of males by using latent profile analysis (LPA) to classify...
Item Response Theory (IRT) provides the ideal framework for generating short test forms (STFs) from item banks or from full-length tests thanks to the possibility of obtaining detailed information on the precision with which each item measures the latent trait. As such, the most precise items can be selected for inclusion in the STF and the number of items can be minimized while the...
Clustering, or cluster analysis, is a family of unsupervised machine learning methods that allow researchers to group sets of observations into smaller subsets (clusters) based on some sort of similarity. As cluster analysis is becoming popular in psychological and social sciences, it comes the need to point out some risks in performing cluster analysis. Even though these methods are mostly...
The incorporation of reverse-worded items in the development of psychometric instruments has been a longstanding practice. Indeed, reverse-worded items are routinely utilized to mitigate response style biases, including acquiescence bias, extreme response bias, and unthinking responding. The present study aimed to contribute novel insights regarding the wording effect. Specifically, we...
