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Dichlorvos (Ref: OMS 14)
Last updated: 18/08/2021
(Also known as: DDVP; dichlorfos; DDVF; denkavepon; vapona)

SUMMARY
Dichlorvos is an organophosphate fumigant insecticide. It has a high aqueous solubility, quite volatile and, based on its chemical properties, is unlikely to leach to groundwater. It is not usually persistent in soils or water. It is highly toxic to mammals and has a high tendency to bioaccumulate. Dichlorvos is also a probable mutagen, a neurotoxin and may damage reproduction and/or development. It is considered to be an acetyl cholinesterase inhibitor. It has a moderate to high toxicity to most biodiversity including honeybees.
Data alerts

The following alerts are based on the data in the tables below. An absence of an alert does not imply the substance has no implications for human health, biodiversity or the environment but just that we do not have the data to form a judgement.

Environmental fate Ecotoxicity Human health
Environmental fate
High alert:
Drainflow: Mobile
Ecotoxicity
High alert:
Birds acute ecotoxicity: High; Daphnia acute ecotoxicity: High; Bees acute oral ecotoxicity: High
Human health
High alert:
Mammals acute toxicity: High; Acetyl cholinesterase inhibitor; Neurotoxicant
GENERAL INFORMATION
Description
A contact and fumigant insecticide used in a range of crop and non-crop situations. Can also be a pesticide transformation product
Example pests controlled
Grain beetle; Flour beetle; Weevils; Grain borer; Flies; Mosquitoes; Cockroaches; Aphids; Thrips
Example applications
Stored cereal grains; Farm buildings; Non-agricultural sites including wineries, factories
Efficacy & activity
Not applicable
Availability status
Current
Introduction & key dates
1959
UK regulatory status
UK COPR regulatory status
Not approved
Date COPR inclusion expires
Expired
UK LERAP status
No UK approval for use
EC Regulation 1107/2009 (repealing 91/414)
EC Regulation 1107/2009 status
Not approved
Dossier rapporteur/co-rapporteur
Italy
Date EC 1107/2009 inclusion expires
Expired
EU Candidate for substitution (CfS)
Not applicable
Listed in EU database
Yes
Approved for use (✓) under EC 1107/2009 in the following EU Member States
ATAustria
BEBelgium
BGBulgaria
CYCyprus
CZCzech Republic
DEGermany
DKDenmark
EEEstonia
ELGreece
                 
ESSpain
FIFinland
FRFrance
HRCroatia
HUHungary
IEIreland
ITItaly
LTLithuania
LULuxembourg
                 
LVLatvia
MTMalta
NLNetherlands
PLPoland
PTPortugal
RORomania
SESweden
SISlovenia
SKSlovakia
                 
Additional information
Also used in
-
Chemical structure
Isomerism
None
Chemical formula
C₄H₇C₁₂O₄P
Canonical SMILES
COP(=O)(OC)OC=C(Cl)Cl
Isomeric SMILES
O=P(O\C=C(/Cl)Cl)(OC)OC
International Chemical Identifier key (InChIKey)
OEBRKCOSUFCWJD-UHFFFAOYSA-N
International Chemical Identifier (InChI)
InChI=1S/C4H7Cl2O4P/c1-8-11(7,9-2)10-3-4(5)6/h3H,1-2H3
2D structure diagram/image available?
Yes
General status
Pesticide type
Insecticide, Acaricide, Metabolite
Metabolite Type
Soil
Substance group
Organophosphate
Minimum active substance purity
950 g kg⁻¹
Known relevant impurities
EU dossier - Chloral (trichloroacetaldehyde) 5 g kg⁻¹
Substance origin
Synthetic
Mode of action
Respiratory, contact and stomach action. Cholinesterase inhibitor.
CAS RN
62-73-7
EC number
200-547-7
CIPAC number
11
US EPA chemical code
084001
PubChem CID
3039
Molecular mass
220.98
PIN (Preferred Identification Name)
2,2-dichloroethenyl dimethyl phosphate
IUPAC name
2,2-dichlorovinyl dimethyl phosphate
CAS name
2,2-dichloroethenyl dimethyl phosphate
Other status information
Severe Marine Pollutant; Evidence of use in third world countries; Chemical subject to PIC regulations; Subject to the provisions of the UK Poisons Act 1972
Relevant Environmental Water Quality Standards
UK Statutory standard for the protection of aquatic life in inland waters: 0.001 µg l⁻¹ as annual average
UK Statutory standard for the protection of aquatic life in coastal and territorial waters: 0.04 µg l⁻¹ as annual average
Herbicide Resistance Classification (HRAC)
Not applicable
Herbicide Resistance Classification (WSSA)
Not applicable
Insecticide Resistance Classification (IRAC)
1B
Fungicide Resistance Classification (FRAC)
Not applicable
Examples of recorded resistance
Aphis gossypii, Culex pipiens pallens, Frankliniella occidentalis, Musca domestica, Myzus persicae, Thrips tabaci, Tribolium confusum, many others
Physical state
Pale yellow clear liquid
Can be a metabolite of:
Parent
Formation medium
Estimated maximum occurrence fraction
1107/2009 relevancy
trichlorfon Soil 0.245 Major fraction, Relevant
naled Soil 0.165 -
Formulations
Property
Value
Example manufacturers & suppliers of products using this active now or historically
  • Value Garden Supplies
  • Fuller Systems
  • Nufarm
  • Ciba Geigy
  • Nippon Soda
  • KenoGard
Example products using this active
  • Dichlorvos 550
  • Derribante
  • Valpona
  • Derriban
  • Vaportape
  • Dichlorvos 1140
Formulation and application details
Often supplied as an emulsifiable concentrate that is diluted with water and used with fogging vaporising equipment. Also used as ready-to-use aerosols.
ENVIRONMENTAL FATE
Property
Value
Source; quality score; and other information
Interpretation
Solubility - In water at 20 °C (mg l⁻¹)
18000
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
High
Solubility - In organic solvents at 20 °C (mg l⁻¹)
Miscible
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
Ethanol
-
Miscible
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
Acetone
-
Miscible
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
Toluene
-
Miscible
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
n-Hexane
-
Melting point (°C)
- - -
Boiling point (°C)
Decomposes before boiling
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
-
Degradation point (°C)
190
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
-
Flashpoint (°C)
350
V3 V = ChemID online databases / IPCS INCHEM (ChemID; IPCS INCHEM )
3 = Unverified data of known source
-
Octanol-water partition coefficient at pH 7, 20 °C
P
7.94 X 1001 Calculated -
Log P
1.9
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
Low
Bulk density (g ml⁻¹)
1.42
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
-
Dissociation constant pKa) at 25 °C
Not applicable
Q3 Q = Miscellaneous internet resources
3 = Unverified data of known source
-
No dissociation
Vapour pressure at 20 °C (mPa)
2100
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
Highly volatile
Henry's law constant at 25 °C (Pa m³ mol⁻¹)
2.58 X 10-02
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
Non-volatile
Maximum UV-vis absorption L mol⁻¹ cm⁻¹
Maxima at 204nm
A2 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
2 = Unverified data of unknown source
-
Surface tension (mN m⁻¹)
- - -
Degradation
Property
Value
Source; quality score; and other information
Interpretation
General biodegradability
-
Soil degradation (days) (aerobic)
DT₅₀ (typical)
2
K4 K = Research datasets, e.g. Pandora, Demetra
4 = Verified data
Non-persistent
DT₅₀ (lab at 20 °C)
2
K4 K = Research datasets, e.g. Pandora, Demetra
4 = Verified data
Non-persistent
DT₅₀ (field)
- - -
DT₉₀ (lab at 20 °C)
- - -
DT₉₀ (field)
- - -
DT₅₀ modelling endpoint
- - -
Note
Other sources: DT₅₀ 0.5 days (DW4), <1 day (R3)
Dissipation rate RL₅₀ on plant matrix
Value
0.2
R3 R = Peer reviewed scientific publications
3 = Unverified data of known source
-
Note
Chrysanthmum leaves, undercover, n=1
Dissipation rate RL₅₀ on and in plant matrix
Value
1.9
R4 R = Peer reviewed scientific publications
4 = Verified data
-
Note
Published literature RL₅₀ range 0.2-3.5 days, 5 field crops, various matrices, n=5
Aqueous photolysis DT₅₀ (days) at pH 7
Value
- - -
Note
-
Aqueous hydrolysis DT₅₀ (days) at 20 °C and pH 7
Value
4.7
K3 K = Research datasets, e.g. Pandora, Demetra
3 = Unverified data of known source
Non-persistent
Note
-
Water-sediment DT₅₀ (days)
0.22
K4 K = Research datasets, e.g. Pandora, Demetra
4 = Verified data
Fast
Water phase only DT₅₀ (days)
- - -
Soil adsorption and mobility
Property
Value
Source; quality score; and other information
Interpretation
Linear
Kd
-
H3 H = The US ARS pesticide properties database (click here )
3 = Unverified data of known source
Mobile
Koc
50
Notes and range
-
Freundlich
Kf
- - -
Kfoc
-
1/n
-
Notes and range
-
pH sensitivity
-
Fate indices
Property
Value
Source; quality score; and other information
Interpretation
GUS leaching potential index
0.69 Calculated Low leachability
SCI-GROW groundwater index (μg l⁻¹) for a 1 kg ha⁻¹ or 1 l ha⁻¹ application rate
Value
1.60 X 10-03 Calculated -
Note
-
Potential for particle bound transport index
Low Calculated -
Potential for loss via drain flow
Mobile Calculated -
Other known metabolites
Metabolite name and reference
Aliases
Formation medium / Rate
Estimated maximum occurrence fraction
Metabolising enzymes
mercapturic acid - Rat (Urinary) - -
methyl cystein - Rat (Urinary) - -
urea - Rat (Urinary) - -
diemethyl dichlorvos
Note: Toxicologically relevant
- Rat - -
2,2-dichloroacetaldehyde
Note: Toxicologically relevant
- Rat - -
2,2-dichloroacetic acid
Note: Toxicologically relevant
- Rat - -
dimethylphosphate - Rat (Urinary) - -
dichloroethanol glucuronide - Rat (Urinary) - -
hippuric acid - Rat (Urinary) - -
ECOTOXICOLOGY
Property
Value
Source; quality score; and other information
Interpretation
Bio-concentration factor
BCF (l kg⁻¹)
Low risk
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
Based on LogP < 3
Low risk
CT₅₀ (days)
- -
Mammals - Acute oral LD₅₀ (mg kg⁻¹)
80
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
Rat
High
Mammals - Short term dietary NOEL
(mg kg⁻¹)
0.5
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
Rat
High
(ppm diet)
- -
Mammals - Chronic 21d NOAEL (mg kg⁻¹ bw d⁻¹)
- - -
Birds - Acute LD₅₀ (mg kg⁻¹)
24
L3 L = Pesticide manuals and hard copy reference books / other sources
3 = Unverified data of known source
Colinus virginianus
High
Birds - Short term dietary (LC₅₀/LD₅₀)
251 ppm
A4 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
4 = Verified data
Colinus virginianus
-
Birds - Chronic 21d NOEL (mg kg⁻¹ bw d⁻¹)
- - -
Fish - Acute 96 hour LC₅₀ (mg l⁻¹)
0.55
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
Oncorhynchus mykiss
Moderate
Fish - Chronic 21 day NOEC (mg l⁻¹)
0.11
Q2 Q = Miscellaneous internet resources
2 = Unverified data of unknown source
Pimephales promelas 28 day
Moderate
Aquatic invertebrates - Acute 48 hour EC₅₀ (mg l⁻¹)
0.00019
L3 L = Pesticide manuals and hard copy reference books / other sources
3 = Unverified data of known source
Daphnia magna
High
Aquatic invertebrates - Chronic 21 day NOEC (mg l⁻¹)
- - -
Aquatic crustaceans - Acute 96 hour LC₅₀ (mg l⁻¹)
0.019
F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment )
4 = Verified data
Americamysis bahia
High
Sediment dwelling organisms - Acute 96 hour LC₅₀ (mg l⁻¹)
- - -
Sediment dwelling organisms - Chronic 28 day NOEC, static, water (mg l⁻¹)
- - -
Sediment dwelling organisms - Chronic 28 day NOEC, sediment (mg kg⁻¹)
- - -
Aquatic plants - Acute 7 day EC₅₀, biomass (mg l⁻¹)
- - -
Non-target plants
- - -
- - -
Algae - Acute 72 hour EC₅₀, growth (mg l⁻¹)
52.8
L3 L = Pesticide manuals and hard copy reference books / other sources
3 = Unverified data of known source
Scenedemus subspicatus
Low
Algae - Chronic 96 hour NOEC, growth (mg l⁻¹)
4.73
Q2 Q = Miscellaneous internet resources
2 = Unverified data of unknown source
Unknown species
Low
Honeybees (Apis spp.)
Contact acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)
- - -
Oral acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)
0.29
L3 L = Pesticide manuals and hard copy reference books / other sources
3 = Unverified data of known source
High
Unknown mode acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)
- - -
Bumblebees (Bombus spp.)
Contact acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)
- - -
-
Oral acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)
- - -
-
Mason bees (Osmia spp.)
Contact acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)
- - -
Oral acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)
- - -
Other pollinators (1)
Acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg insect⁻¹)
- - -
Mode of exposure
-
Other pollinators (2)
Acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg insect⁻¹)
- - -
Mode of exposure
-
Earthworms - Acute 14 day LC₅₀ (mg kg⁻¹)
- - -
Earthworms - Chronic NOEC, reproduction (mg kg⁻¹)
- - -
Other soil macro-organisms
Acute LC₅₀ (mg kg⁻¹)
- - -
Chronic NOEC (mg kg⁻¹)
- - -
Other arthropod (1)
LR₅₀ g ha⁻¹
- - -
% Effect
- - -
Other arthropod (2)
LR₅₀ g ha⁻¹
- - -
% Effect
- - -
Soil micro-organisms
Nitrogen mineralisation: No significant adverse effect
Carbon mineralisation: No significant adverse effect
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes

Dose: 13.4 mg kg⁻¹ soil
-
Mesocosm study data
NOEAEC mg l⁻¹
- - -
NOEAEC mg l⁻¹
- - -
HUMAN HEALTH AND PROTECTION
General
Property
Value
Source; quality score; and other information
Interpretation
Threshold of Toxicological Concern (Cramer Class)
High (class III) - -
Mammals - Acute oral LD₅₀ (mg kg⁻¹)
80
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
Rat
High
Mammals - Dermal LD₅₀ (mg kg⁻¹ body weight)
120
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
Rat
-
Mammals - Inhalation LC₅₀ (mg l⁻¹)
0.083
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
Rat
-
Other Mammal toxicity endpoints
- - -
ADI - Acceptable Daily Intake (mg kg⁻¹ bw day⁻¹)
0.00008
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
Dog SF=100
-
ARfD - Acute Reference Dose (mg kg⁻¹ bw day⁻¹)
0.002
A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
5 = Verified data used for regulatory purposes
Rat SF=100
-
AAOEL - Acute Acceptable Operator Exposure Level (mg kg⁻¹ bw day⁻¹)
- - -
AOEL - Acceptable Operator Exposure Level - Systemic (mg kg⁻¹ bw day⁻¹)
0.0005
A2 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications )
2 = Unverified data of unknown source
Dog SF=100
-
Dermal penetration studies (%)
- - -
Dangerous Substances Directive 76/464
List I; List II - -
Exposure Routes
Public
Low risk to Europeans as no longer approved for use
Occupational
Primary risk if re-entry occurs post application
MRLs
European
EU MRL pesticide database 
Great Britain
GB MRL Register 
Notes
-
Drinking Water Standards
- - -
Drinking Water MAC (μg l⁻¹)
- - -
Health issues
Specific human health issues
Carcinogen
Genotoxic
Endocrine disruptor
?Possibly, status not identified
A2 A = Chromosome aberration (EFSA database)
2 = Mixed/ambiguous results
;
B2 B = DNA damage/repair (EFSA database)
2 = Mixed/ambiguous results
;
C2 C = Gene mutation (EFSA database)
2 = Mixed/ambiguous results
;
D2 D = Genome mutation (EFSA database)
2 = Mixed/ambiguous results
;
E1 E = Unspecified genotoxicity type (miscellaneous data source)
1 = Positive
?Possibly, status not identified
Reproduction / development effects Acetyl cholinesterase inhibitor Neurotoxicant
No data found
Yes, known to cause a problem
Yes, known to cause a problem
Respiratory tract irritant Skin irritant Skin sensitiser
?Possibly, status not identified
Yes, known to cause a problem
?Possibly, status not identified
Eye irritant Phototoxicant  
Yes, known to cause a problem
No data found  
General human health issues
IARC Group 2B carcinogen
Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin
Some minor concerns regarding endocrine disruption
Endocrine issues - Weak androgen-receptor antagonist
Handling issues
Property
Value and interpretation
General
Corrosive in molten state
IMDG Transport Code is usually 6.1
CLP classification 2013
Health: H301, H311, H317, H330
Environment: H400
EC Risk Classification
T+ - Very toxic: R26
T - Toxic: R24/25
Xn - Harmful: R43
N - Dangerous for the environment: R50
EC Safety Classification
S1/2, S28, S36/37, S45, S61
WHO Classification
Ib (Highly hazardous / Highly hazardous)
UN Number
3018
Waste disposal & packaging
Packaging Group II (medium danger)
TRANSLATIONS
Language
Name
English
dichlorvos
French
dichlorvos
German
Dichlorvos
Danish
dichlorvos
Italian
diclorvos
Spanish
diclorvos
Greek
dichlorvos
Polish
dichlorfos
Swedish
-
Hungarian
dichlorvos
Dutch
dichloorvos

Record last updated: 18/08/2021
Contact: aeru@herts.ac.uk
Please cite as: Lewis, K.A., Tzilivakis, J., Warner, D. and Green, A. (2016) An international database for pesticide risk assessments and management. Human and Ecological Risk Assessment: An International Journal, 22(4), 1050-1064. DOI: 10.1080/10807039.2015.1133242