Dear editors,
Ransing et al. (Ransing et al., 2020) recently summarized the current available instruments
for assessing mental health issues relating to the COVID-19 pandemic in Brain, Behavior,
and Immunity. Among the four instruments reviewed by Ransing et al. (Ransing et al.,
2020) was the Fear of COVID-19 Scale (FCV-19S) that we co-developed and rated as having
the most evidence in relation to its psychometric properties. While the Coronavirus
Anxiety Scale (CAS) (Lee, 2020) and the Obsession with COVID-19 Scale (OCS) (Lee,
2020) both have versions in other languages, only have their English version has been
psychometrically validated. Moreover, the COVID Stress Scale (CSS) (Taylor et al.,
2020) has only been validated in English. However, the FCV-19S, as reviewed by Ransing
et al. (Ransing et al., 2020), has been translated into different language versions
and tested in different country populations. Ransing et al. (Ransing et al., 2020)
recommend there is a need to translate, validate, and cultural-adapt the existing
instruments. We would like to point out that the FCV-19S has already been validated
in many languages with good psychometric properties including English (Harper et al.,
2020), Persian (Ahorsu et al., 2020), Bangla (Sakib et al., 2020), Italian (Soraci
et al., 2020), Hebrew (Bitan et al., 2020), Arabic (Alyami et al., 2020), Russian
(Reznik et al., 2020), and Turkish (Satici et al., 2020). We are also aware that there
are other versions currently under review including versions in Spanish, Japanese,
Hindi, Malaysian, and Polish. To the best of our knowledge, these research teams have
also found good psychometric properties for the FCV-19S. Therefore, we are confident
that the FCV-19S has already fulfilled the recommendation made by Ransing et al. (Ransing
et al., 2020) Moreover, the FCV-19S is arguably more theoretically grounded than other
COVID-19-related instruments in that it was developed using the Protection Motivation
Theory (Rogers, 1975), while the other three instruments do not report any theoretical
framework to support their development.
However, we would like to clarify the remarks made by Ransing et al. (Ransing et al.,
2020) regarding the unstable factor structure of the FCV-19S (i.e., a two-factor structure
found in the Russian FCV-19S11). In addition to the Russian version, the Hebrew FCV-19S
(Bitan et al., 2020) also reported a two-factor structure. However, we are of the
opinion that the two-factor structure proposed by both the Russian and Hebrew versions
are a consequence of their inappropriate use of principal component analysis (PCA)
or exploratory factor analysis (EFA). Given that many language versions of the FCV-19S
(Alyami et al., 2020, Sakib et al., 2020, Soraci et al., 2020) confirmed its unidimensional
structure, the use of PCA or EFA is not justified because a confirmatory factor analysis
(CFA) should have been performed. (Pakpour et al., 2020) Only if the researchers have
strong reasons to doubt the theoretical framework, should they have considered applying
EFA for further understanding in an instrument’s factor structure.
Ransing et al. (Ransing et al., 2020) also recommend validating the instruments among
vulnerable populations, including elderly, children, adolescents, young adults, and
people with pre-existing physical and mental illness. We totally agree with the recommendation
and would like to respond that we have already collected FCV-19S among individuals
with mental illness, elderly people who have visited an outpatient department in a
medical center, and adolescents. The collections were all face-to-face interviews
and administered by several research assistants and online surveys. Those with mental
illness (n=516; 294 males; mean age=47.5 years) were interviewed between March 23
and May 15, 2020 from the Jianan Psychiatric Center, Taiwan. Elderly individuals (n=139;
42 males; mean age=71.7) were interviewed between May 1 and 15, 2020 from the Wan
Fang Hospital, Taiwan. The adolescents (n=582; 274 males; mean age=18.02 years) completed
an online survey between March and April 2020 from a Bangla community (Sakib et al.,
2020). Utilizing CFA with the estimator of diagonally weighted least squares, we found
that the FCV-19S also supported the unidimensional structure in the three vulnerable
samples (Table 1
). Therefore, we believe that the FCV-19S can assess fear of COVID-19 among clinical
and vulnerable samples. Nevertheless, we agree with the other future directions proposed
by Ransing et al. (Ransing et al., 2020) regarding the need for the development of
both clinically administered instruments and instruments assessing stigma (Lin, 2020).
Table 1
Factor structure of the Fear of COVID-19 Scale (FCV-19S) in three vulnerable samples
Mental illness
Elderly
Adolescent
Item #
Factor loading
F1
0.66
0.72
0.72
F2
0.81
0.54
0.66
F3
0.82
0.29
0.73
F4
0.82
0.65
0.77
F5
0.85
0.77
0.69
F6
0.82
0.46
0.64
F7
0.86
0.38
0.65
Fit statistics
χ2 (df)/ p
44.97 (14)/ <0.001
24.10 (14)/ 0.045
21.53 (14)/ 0.09
CFI
0.992
0.960
0.997
TLI
0.989
0.941
0.995
RMSEA
0.066
0.072
0.030
90% CI of RMSEA
0.045, 0.087
0.011, 0.120
0.000, 0.055
CFI=comparable fit index; TLI=Tucker-Lewis index; RMSEA=root mean square error of
approximation.