Verbal fluency and creativity: General and specific contributions of broad retrieval ability (Gr) factors to divergent thinking

The Cattell–Horn–Carroll (CHC) model of intelligence views creativity as a first-level factor within the second-level factor of broad retrieval ability (Gr), alongside other first-level abilities such as ideational fluency and word fluency. Traditional methods of measuring creativity, however, confound idea quality with idea quantity, which might exaggerate the relationship between creativity scores and verbal fluency factors. Participants (n = 131 adults) completed two divergent thinking tasks (unusual uses for a rope and a box), which were scored using newer methods that effectively separate creativity (scored via subjective ratings) and fluency (scored as number of responses). They then completed 16 verbal fluency tasks that assessed six lower-order Gr factors: word fluency, associational fluency, associative flexibility, ideational fluency, letter fluency, and dissociative ability. Viewed singly, many of the lower-order factors significantly predicted creative quality and fluency. General Gr had substantial effects on creative quality (standardized β = .443) and fluency (β = .339) in a higher-order model as well as in a bifactor model (quality β = .380, fluency β = .327). Moreover, general Gr was the only significant predictor in the bifactor model, suggesting that it, not the specific factors, was most important. All effects were essentially the same after controlling for typing speed and vocabulary knowledge. The findings thus support the CHC view of creativity/originality as a lower-order component of Gr, illuminate the relationships between creativity and first-level Gr factors, extend the study of creativity and intelligence beyond fluid intelligence, and further indicate that creativity is more closely tied to cognitive abilities than creativity research has yet recognized.     

The creativity quotient: An objective scoring of ideational fluency

A classical test for accessing the potential creativity of an individual is based on ideational fluency, where a person is asked to generate all possible uses for a familiar item like a piece of paper. In scoring the results, it is intuitive that the suggested uses should not be weighted equally. Those suggested in radically different categories are “worth more”; than those suggested within the same category only. We used information theory to derive a simple mathematical expression for a more objective measure of ideational fluency. We call this the creativity quotient (CQ). This innovative measure was examined using a small sample of participants, and is illustrated by the responses of two typical individuals from an ideational fluency task. The CQ accounts for the number of ideas (fluency), plus the number of categories (flexibility). Ongoing research will examine the independence of CQ from established measures of intelligence and personality.     

Semantic and phonemic verbal fluency in Parkinson's disease: Influence of clinical and demographic variables

Changes of cognitive function in PD have been extensively documented and defined as a 'frontal' type executive dysfunction. One of the main components of this executive dysfunction is the impairment of verbal fluency. The aim of the present study was to assess semantic and phonemic fluency in a large sample of PD patients and to investigate the effect of clinical and sociodemographic variables on verbal fluency in this patient group. Three hundred patients with idiopathic Parkinson's disease who were consecutive referrals to our clinic and 50 age and education matched healthy controls completed the phonemic and semantic verbal fluency tasks. Both phonemic and semantic verbal fluency were significantly impaired in PD patients relative to matched controls. Stage of illness, presence of depression, education and age influenced verbal fluency measures. Regression analyses established that global measures of cognitive ability (MMSE) and executive function (FAB) and side of onset of motor symptoms predicted 36-37% of variance of phonemic or semantic verbal fluency measures. Thus, future studies aimed at assessing cognitive functioning in PD patients treated by deep brain stimulation (DBS) should adequately take into account several factors (stage of illness, depression, executive functioning) which may potentially influence performance on verbal fluency tasks.     

Assessing Ideational Fluency in Primary Students in Hong Kong

We tested 462 primary students (244 boys and 218 girls) in Grades 1, 2, and 3 from 20 primary schools in Hong Kong. Their ideational fluency was assessed by using 2 items each on 3 types of verbal tasks (instances, uses, and similarities) and 2 types of figural tasks (pattern meanings and line meanings) from the Wallach-Kogan tests. On the average, students generated about 20 instances, gave 9 alternative uses of a common object, listed 11 possible similarities between a pair of named objects, and gave 13 and 15 possible meanings for visual patterns and lines, respectively. Although boys scored consistently higher in ideational fluency than girls on verbal tasks, significant gender differences did not emerge for figural tasks. Significantly higher scores on ideational fluency were evident for students in higher grades especially for verbal tasks. The use of the Wallach-Kogan tests in the assessment of divergent thinking ability and creativity for Chinese children is discussed.     

An Evaluation of Alternative Ways of Computing the Creativity Quotient in a Design School Sample

Certain educational programs and jobs require selecting individuals based on their creativity. Tests of creativity are commonly based on divergent thinking tasks. The scoring of the ideational output of such tasks should ideally be done based on fluency (the number of ideas generated), flexibility (the number of categories into which the generated ideas can be partitioned), and originality (the number of unique or unusual ideas). However, most scoring procedures do not take into account all three dimensions. Building on the Creativity Quotient (CQ) measure (Snyder, Mitchell, Bossomaier & Pallier, 2004 Snyder , A. , Mitchell , J. , Bossomaier , T. , & Pallier , G. ( 2004 ). The creativity quotient: An objective scoring of ideational fluency . Creativity Research Journal , 16 , 415 – 420 .[Taylor & Francis Online], [Web of Science ®] , [Google Scholar]), which covers fluency and flexibility, an adjusted CQ and two CQs based on diversity type measures are proposed. Findings indicated that an adjusted measure that weights categories based on their discriminative power was most strongly related to other predictors of performance on creative tasks and thus presents an important advance over the original CQ.     

Teachers' judgments of preschoolers' creativity

This study investigated the relationship of objective measures of preschoolers' ideational fluency and intelligence to teachers' ratings of creativity and desirability. The sample of 60 4-yr.-olds and 39 teachers were from six classrooms. Teachers' ratings of creativity were related to measures of intelligence (r = .46, p less than .001) but not to ideational fluency (r = .10). These findings are discussed in relation to possible halo effects and the ability to discriminate adequately cognitive abilities among preschool children.     

Assessment of visual-spatial deficits in patients with Parkinson's disease and closed head injuries using virtual environments.

Cognitive spatial deficits have been reliably reported in patients with Closed Head Injury (CHI), though in patients with Parkinson's disease (PD) the phenomenon is disputed. CHI and non-demented PD patients were tested using a Judgement of Line Orientation Test, and two spatial tests using virtual environments (VEs). Performance on the Line Orientation and one VE test was worse in the CHI group than controls, but PD patients showed no apparent spatial deficits. However, performance on the second VE test (virtual tray of objects task) did reveal a deficit, both CHI and PD groups being significantly impaired. The data illustrate that particular spatial deficits can be differentiated using appropriate VE-based tasks, and that non-demented PD patients show a paradigm-specific visual-spatial impairment.     

Creative potential and conceptual tempo in preschool children

The individual stylistic variations of creative potential and conceptual tempo were investigated in preschool children (n = 61; mean age = 56.9 months). The measure used for the conceptual tempo was the Kansas Reflection Impulsivity Scale for Preschoolers (KRISP), and the Multidimensional Stimulus Fluency Measure (MSFM) was used to assess ideational fluency and creative potential Contrary to expectations, no differences between reflective and impulsive preschoolers were found on the ideational fluency measure. However, analysis of all four quadrants of the conceptual tempo dimensions derived from median splits revealed an interaction of KRISP latency and error scores, F(157) = 12.78, p < .001, with greater originality scores evidenced by the fast/accurate and slow/inaccurate groups than the slow/ accurates and fast/inaccurates. Implications of this unusual finding were discussed in terms of the manner in which children may approach convergent and divergent tasks.     

Verbal fluency over time as a measure of automatic and controlled processing in children with ADHD

The performance of ADHD children on semantic category fluency (SCF) versus initial letter fluency (ILF) tasks was examined. For each participant, word production was recorded for each 15-s time slice on each task. Performance on both fluency tasks was compared to test the hypothesis that children with ADHD are characterized by a performance deficit on the ILF task because performance on this task is less automated than performance on the SCF. Children classified with ADHD (N = 20) were compared to children with other psychopathology (N = 118) and healthy controls (N = 130). Results indicated that the groups could not be differentiated by the total number of words produced in 60 s in either fluency task. As hypothesized, a significant interaction of group by productivity over time by type of fluency task was found: ADHD children had more problems finding words in the first 15 s of the IFL than did children in the other two groups, and as compared with their performance on the SCF. Results were taken to indicate that children with ADHD symptoms show a delay in the development of automating skills for processing abstract verbal information.     

Creativity and Affective Temperament in Artistic and Non-artistic Students: Different Temperaments are Related to Different Aspects of Creativity

The relationship between creativity and temperament has been well documented in studies with professional artists. This also pertains to affective temperaments which constitute the vulnerability to affective disorders. However, less is known about the contribution of particular temperaments to specific components of creativity, for example, ideational fluency, or originality of thinking. The aim of the present study was to assess affective temperaments and creativity in artistic and non-artistic students. Ninety (39 artistic and 51 non-artistic) students were enrolled in the study. Affective temperaments were evaluated by means of TEMPS-A questionnaire. Creativity was measured with BWAS test assessing the originality of thinking and a sample of tasks derived from BIS battery, assessing ideational fluency. Artistic students showed higher rates of cyclothymic temperament. They also outperformed non-artistic students in both domains of creativity. The originality of thinking correlated positively with the level of cyclothymic temperament, whereas ideational fluency was positively related to hyperthymic temperament. Ideational fluency also correlated with the level of parental education. Results indicate that creativity is related to temperaments underlying predisposition to bipolar affective disorder; however, different temperaments are related to different aspects of creativity.     

Sex differences in verbal fluency: a short note

Adult male and female subjects performed two fluency tasks from the 'Kit of Reference Tests for Cognitive Factors'. Although both word fluency and ideational fluency are said to show female superiority, a significant difference in favour of females could be found only in the task which primarily requires lexical access and not in the task requiring mental access to colour and form of objects.     

Suicidal behavior and cognitive flexibility: design and verbal fluency after attempted suicide

Aspects of problem solving were measured in nine male psychiatric patients, hospitalized after attempted suicide. Testing took place within 3 weeks (except for one patient) of the suicide attempt. Controls were patients with chronic idiopathic pain and healthy volunteers. Suicidal patients had significantly lower scores on general intellectual tests and in verbal and design fluency. No differences in problem solving (the Perceptual Maze Test and the Wisconsin Card-Sorting Test) and flexibility (the Uses of Objects Test and the Stroop Test) were found. The results are interpreted as indicating a decreased ability of suicidal patients to generate new ideas, when no alternatives are provided.     

The impact of Parkinson's disease on sequence learning: perceptual pattern learning and executive function

The current study examined the contribution of brain areas affected by Parkinson's disease (PD) to sequence learning, with a specific focus on response-related processes, spatial attentional control, and executive functioning. Patients with mild PD, patients with moderate PD, and healthy age-matched participants performed three tasks-a sequence learning task with a spatial pattern that was incidental to response selection, a spatial cuing task, and neuropsychological tests of executive function. Whereas moderate PD patients failed to show significant sequence learning, mild PD patients performed comparably with controls. Neither group of PD patients was impaired in the control of spatial attention. Sequence learning was correlated with neuropsychological measures of executive function but not with the ability to control spatial attention. These results suggest that the contribution of the brain areas affected by PD to sequence learning extends beyond motor learning to include the learning of perceptual patterns and involves executive function, including cognitive flexibility and set shifting.     

Differential impacts of age of acquisition on letter and semantic fluency in Alzheimer's disease patients and healthy older adults

The degree to which the typical age of acquisition (AoA) of words and word frequency have separable influences on verbal production tasks has been strongly debated. To examine the overlap between these factors in verbal fluency tasks, the performance of Alzheimer's disease (AD) patients (N = 34) and normal elderly controls (N = 36) was compared on semantic (e.g., vegetables) and letter (e.g., words that begin with F) fluency tasks. These comparisons revealed that words generated for the semantic fluency task had an earlier AoA while words generated for the letter fluency task had a higher word frequency. Differences in AoA between AD patients and controls were larger for semantic than letter fluency. These results suggest that AoA has an effect on verbal production that is independent of word frequency and that AoA has a semantic locus.     

Egocentrism in sub-clinical depression

Depression is marked by rigid thinking and the inability to generate different and more positive views on the self. The current study conceptualises this a perspective-taking deficit, which is defined as a deficit in the ability to overcome one’s egocentrism. Previous research has demonstrated that individuals with depression are impaired in Theory of Mind reasoning and empathy – two social cognitions that involve cognitive and affective perspective-taking. Here, it was investigated whether these deficits generalise to visuo-spatial perspective-taking. To test this, a convenience sample (N?=?268; n?=?62 high depressive symptoms; n?=?206 healthy control participants) completed a test-battery including measures of cognitive and visuo-spatial perspective-taking and closely matched cognitive and visuo-spatial control tasks. The results showed that individuals exhibiting high levels of depressive symptoms were specifically impaired on both perspective-taking tasks but performed equally well on the control tasks. Interventions to combat rigid thinking in depression are discussed.     

The Effect of Changes in the Temperature and Humidity of the Air on the Apparent Skin Resistance

The effects of affective expression on divergent thinking performance were studied in 40 male and female graduate education students. Divergent thinking was operationally defined in terms of the ideational fluency and originality dimensions of Guilford's (4) Plot Titles test. Experimental group E1, in which emotional states were related to visual stimuli, produced significantly more original responses than experimental group E2 (p < .025), in which the same visual patterns viewed in terms of their geometrical-technical dimensions, and control group C1 (p < .01), in which no training was administered. Groups E2 and C1 demonstrated no significant differences. The groups did not differ with respect to ideational fluency. Verbal ability was a poor predictor of individual differences in ideational fluency and originality. The results suggest an effective approach toward fostering originality and indicate that nonintellective variables may be significant in the creative process.     

Flexibility and Originality in Children's Divergent Thinking

Previous research on the ideational process indicates that original ideas increase in frequency as an examinee works through an open-ended task. In the present investigation, ideational flexibility was evaluated to determine if ideas also become more varied and diverse. Additionally, the relationship of intelligence (IQ) with order effects of both originality and flexibility was investigated. Tests of verbal and figural divergent thinking were administered to 80 intermediate school children. The midpoint of each individual's ideational set was found, and the flexibility and originality scores of each half of the set were compared. Results indicated that flexibility and originality scores were higher in the second half than the first half of the ideational set, but there were significant differences between high- and low-originality subjects and differences between the verbal and the figural tests. The order effect was unrelated to the IQ scores of the subjects. Suggestions are made to integrate ideational flexibility into existing theories of divergent ideation.     

The Sum and Substance of It: The Appreciation of Mass and Count Quantifiers in Parkinson′s Disease

We performed three experiments in order to determine whether patients with Parkinson′s disease (PD) have a sentence comprehension impairment. In the first experiment, we found that nondemented PD patients were impaired at matching a short sentence containing a mass or count quantifier (e.g., "Point to the jar with many") with one of four pictures. Patients erred by pointing to the incorrect mass or count type of substance, but pointed correctly to the large or small amount of a substance in the picture. In the second experiment, we asked the same PD patients to judge short sentences containing mass or count nouns modified by mass or count adjectives (e.g., *"The glass contains many milk"). PD patients were significantly impaired at detecting errors in the agreement between a noun and a quantifying adjective and errors in the appropriate use of the plural associated with a noun. A sentence completion task was performed in order to determine whether patients impaired on both sentence-picture matching and sentence judgment tasks are also compromised in their expression of quantifiers. Some patients impaired on both tasks also had difficulty expressing quantifiers, and it is these patients who may have difficulty performing grammatical computations. Other patients were selectively impaired in their sentence-picture matching or their sentence judgments, suggesting a performance deficit concerned with a particular task. We conclude that sentence comprehension impairments in PD are multifactorial in nature.     

A paradigm for emulating the early learning stage of handwriting: Performance comparison between healthy controls and Parkinson’s disease patients in drawing loop shapes

We present a novel paradigm, aimed at emulating the early stage of handwriting learning in proficient writers, by asking them to produce a familiar shape through a novel (unfamiliar) motor plan. Handwriting of beginner writers is characterized by slower movements, reduced spatial precision, lower fluency and reduced force regulation compared to those observed in the handwriting production of proficient writers. Features observed in the ink trace obtained with the novel motor plan and performance comparison of the handwriting obtained by familiar and unfamiliar motor plan suggest that the proposed paradigm is able to elicit non-automated movements in proficient writers.As that produced by beginner writers, handwriting of Parkinson’s disease (PD) patients is characterized by lack of fluency, slowness and abrupt changes of direction. Furthermore, PD patients show impaired performance in learning novel motor behaviors, as well as in executing motor behaviors acquired before the onset of the disease. We used the proposed paradigm for comparing the performance achieved by healthy controls in writing a familiar shape through a novel motor plan with those obtained by PD patients performing a well-known motor plan for drawing the same shape. Our analysis points out some similarities between performance obtained by healthy controls and those obtained by PD patients, sustaining the hypothesis that the fine tuning of the motor plan parameters involved in the handwriting production is impaired by PD.     

Mechanisms underlying corruption of working memory in Parkinson's disease

Working memory (WM) impairments are reported to occur in patients with Parkinson's disease (PD). However, the mechanisms are unclear. Here, we investigate several putative factors that might drive poor performance, by examining the precision of recall, the order in which items are recalled and whether memories are corrupted by random guessing (attentional lapses). We used two separate tasks that examined the quality of WM recall under different loads and retention periods, as well as a traditional digit span test. Firstly, on a simple measure of WM recall, where patients were asked to reproduce the orientation of a centrally presented arrow, overall recall was not significantly impaired. However, there was some evidence for increased guessing (attentional lapses). On a new analogue version of the Corsi-span task, where participants had to reproduce on a touchscreen the exact spatial pattern of presented stimuli in the order and locations in which they appeared, there was a reduction in the precision of spatial WM at higher loads. This deficit was due to misremembering item order. At the highest load, there was reduced recall precision, whereas increased guessing was only observed at intermediate set sizes. Finally, PD patients had impaired backward, but not forward, digit spans. Overall, these results reveal the task- and load-dependent nature of WM deficits in PD. On simple low-load tasks, attentional lapses predominate, whereas at higher loads, in the spatial domain, the corruption of mnemonic information—both order item and precision—emerge as the main driver of impairment.